---
_id: '10920'
abstract:
- lang: eng
text: The spin-orbit interaction permits to control the state of a spin qubit via
electric fields. For holes it is particularly strong, allowing for fast all electrical
qubit manipulation, and yet an in-depth understanding of this interaction in hole
systems is missing. Here we investigate, experimentally and theoretically, the
effect of the cubic Rashba spin-orbit interaction on the mixing of the spin states
by studying singlet-triplet oscillations in a planar Ge hole double quantum dot.
Landau-Zener sweeps at different magnetic field directions allow us to disentangle
the effects of the spin-orbit induced spin-flip term from those caused by strongly
site-dependent and anisotropic quantum dot g tensors. Our work, therefore, provides
new insights into the hole spin-orbit interaction, necessary for optimizing future
qubit experiments.
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
acknowledgement: "This research was supported by the Scientific Service Units of ISTA
through resources provided by the MIBA Machine Shop and the nanofabrication facility.
This project has received funding from the European Union’s Horizon 2020 research
and innovation program under the Marie\r\nSkłodowska-Curie Grant Agreement No. 844511,
No. 75441, and by the FWF-P 30207, I05060, and M3032-N projects. A. B. acknowledges
support from the EU Horizon-2020 FET project microSPIRE, ID: 766955. P.M. M. and
G. B. acknowledge funding by the Deutsche Forschungsgemeinschaft (DFG—German Research
Foundation) under Project No. 450396347. This work was supported by the Royal Society
(URF\\R1\\191150) and the European Research Council (Grant Agreement No. 948932),
N. A. acknowledges the use of the University of Oxford Advanced Research Computing
(ARC) facility."
article_number: '126803'
article_processing_charge: No
article_type: original
author:
- first_name: Daniel
full_name: Jirovec, Daniel
id: 4C473F58-F248-11E8-B48F-1D18A9856A87
last_name: Jirovec
orcid: 0000-0002-7197-4801
- first_name: Philipp M.
full_name: Mutter, Philipp M.
last_name: Mutter
- first_name: Andrea C
full_name: Hofmann, Andrea C
id: 340F461A-F248-11E8-B48F-1D18A9856A87
last_name: Hofmann
- first_name: Alessandro
full_name: Crippa, Alessandro
id: 1F2B21A2-F6E7-11E9-9B82-F7DBE5697425
last_name: Crippa
orcid: 0000-0002-2968-611X
- first_name: Marek
full_name: Rychetsky, Marek
last_name: Rychetsky
- first_name: David L.
full_name: Craig, David L.
last_name: Craig
- first_name: Josip
full_name: Kukucka, Josip
id: 3F5D8856-F248-11E8-B48F-1D18A9856A87
last_name: Kukucka
- first_name: Frederico
full_name: Martins, Frederico
id: 38F80F9A-1CB8-11EA-BC76-B49B3DDC885E
last_name: Martins
orcid: 0000-0003-2668-2401
- first_name: Andrea
full_name: Ballabio, Andrea
last_name: Ballabio
- first_name: Natalia
full_name: Ares, Natalia
last_name: Ares
- first_name: Daniel
full_name: Chrastina, Daniel
last_name: Chrastina
- first_name: Giovanni
full_name: Isella, Giovanni
last_name: Isella
- first_name: 'Guido '
full_name: 'Burkard, Guido '
last_name: Burkard
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
citation:
ama: Jirovec D, Mutter PM, Hofmann AC, et al. Dynamics of hole singlet-triplet qubits
with large g-factor differences. Physical Review Letters. 2022;128(12).
doi:10.1103/PhysRevLett.128.126803
apa: Jirovec, D., Mutter, P. M., Hofmann, A. C., Crippa, A., Rychetsky, M., Craig,
D. L., … Katsaros, G. (2022). Dynamics of hole singlet-triplet qubits with large
g-factor differences. Physical Review Letters. American Physical Society.
https://doi.org/10.1103/PhysRevLett.128.126803
chicago: Jirovec, Daniel, Philipp M. Mutter, Andrea C Hofmann, Alessandro Crippa,
Marek Rychetsky, David L. Craig, Josip Kukucka, et al. “Dynamics of Hole Singlet-Triplet
Qubits with Large g-Factor Differences.” Physical Review Letters. American
Physical Society, 2022. https://doi.org/10.1103/PhysRevLett.128.126803.
ieee: D. Jirovec et al., “Dynamics of hole singlet-triplet qubits with large
g-factor differences,” Physical Review Letters, vol. 128, no. 12. American
Physical Society, 2022.
ista: Jirovec D, Mutter PM, Hofmann AC, Crippa A, Rychetsky M, Craig DL, Kukucka
J, Martins F, Ballabio A, Ares N, Chrastina D, Isella G, Burkard G, Katsaros G.
2022. Dynamics of hole singlet-triplet qubits with large g-factor differences.
Physical Review Letters. 128(12), 126803.
mla: Jirovec, Daniel, et al. “Dynamics of Hole Singlet-Triplet Qubits with Large
g-Factor Differences.” Physical Review Letters, vol. 128, no. 12, 126803,
American Physical Society, 2022, doi:10.1103/PhysRevLett.128.126803.
short: D. Jirovec, P.M. Mutter, A.C. Hofmann, A. Crippa, M. Rychetsky, D.L. Craig,
J. Kukucka, F. Martins, A. Ballabio, N. Ares, D. Chrastina, G. Isella, G. Burkard,
G. Katsaros, Physical Review Letters 128 (2022).
date_created: 2022-03-24T15:51:11Z
date_published: 2022-03-24T00:00:00Z
date_updated: 2023-08-03T06:14:58Z
day: '24'
ddc:
- '530'
department:
- _id: GradSch
- _id: GeKa
doi: 10.1103/PhysRevLett.128.126803
ec_funded: 1
external_id:
arxiv:
- '2111.05130'
isi:
- '000786542500004'
file:
- access_level: open_access
checksum: 6e66ad548d18db9c131f304acbd5a1f4
content_type: application/pdf
creator: dernst
date_created: 2022-03-28T06:53:39Z
date_updated: 2022-03-28T06:53:39Z
file_id: '10928'
file_name: 2022_PhysRevLetters_Jirovec.pdf
file_size: 1266515
relation: main_file
success: 1
file_date_updated: 2022-03-28T06:53:39Z
has_accepted_license: '1'
intvolume: ' 128'
isi: 1
issue: '12'
language:
- iso: eng
month: '03'
oa: 1
oa_version: Published Version
project:
- _id: 26A151DA-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '844511'
name: Majorana bound states in Ge/SiGe heterostructures
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
- _id: 2641CE5E-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P30207
name: Hole spin orbit qubits in Ge quantum wells
- _id: c0977eea-5a5b-11eb-8a69-a862db0cf4d1
grant_number: I05060
name: High impedance circuit quantum electrodynamics with hole spins
- _id: c08c05c4-5a5b-11eb-8a69-dc6ce49d7973
grant_number: M03032
name: Long-range spin exchange for 2D qubits architectures
publication: Physical Review Letters
publication_identifier:
eissn:
- 1079-7114
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
status: public
title: Dynamics of hole singlet-triplet qubits with large g-factor differences
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 128
year: '2022'
...
---
_id: '9464'
abstract:
- lang: eng
text: We firstly introduce the self-assembled growth of highly uniform Ge quantum
wires with controllable position, distance and length on patterned Si (001) substrates.
We then present the electrically tunable strong spin-orbit coupling, the first
Ge hole spin qubit and ultrafast operation of hole spin qubit in the Ge/Si quantum
wires.
acknowledgement: This work was supported by the National Key R&D Program of China
(Grant No. 2016YFA0301700) and the ERC Starting Grant no. 335497.
article_number: '9420817'
article_processing_charge: No
author:
- first_name: Fei
full_name: Gao, Fei
last_name: Gao
- first_name: Jie Yin
full_name: Zhang, Jie Yin
last_name: Zhang
- first_name: Jian Huan
full_name: Wang, Jian Huan
last_name: Wang
- first_name: Ming
full_name: Ming, Ming
last_name: Ming
- first_name: Tina
full_name: Wang, Tina
last_name: Wang
- first_name: Jian Jun
full_name: Zhang, Jian Jun
last_name: Zhang
- first_name: Hannes
full_name: Watzinger, Hannes
id: 35DF8E50-F248-11E8-B48F-1D18A9856A87
last_name: Watzinger
- first_name: Josip
full_name: Kukucka, Josip
id: 3F5D8856-F248-11E8-B48F-1D18A9856A87
last_name: Kukucka
- first_name: Lada
full_name: Vukušić, Lada
id: 31E9F056-F248-11E8-B48F-1D18A9856A87
last_name: Vukušić
orcid: 0000-0003-2424-8636
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
- first_name: Ke
full_name: Wang, Ke
last_name: Wang
- first_name: Gang
full_name: Xu, Gang
last_name: Xu
- first_name: Hai Ou
full_name: Li, Hai Ou
last_name: Li
- first_name: Guo Ping
full_name: Guo, Guo Ping
last_name: Guo
citation:
ama: 'Gao F, Zhang JY, Wang JH, et al. Ge/Si quantum wires for quantum computing.
In: 2021 5th IEEE Electron Devices Technology and Manufacturing Conference,
EDTM 2021. IEEE; 2021. doi:10.1109/EDTM50988.2021.9420817'
apa: 'Gao, F., Zhang, J. Y., Wang, J. H., Ming, M., Wang, T., Zhang, J. J., … Guo,
G. P. (2021). Ge/Si quantum wires for quantum computing. In 2021 5th IEEE Electron
Devices Technology and Manufacturing Conference, EDTM 2021. Virtual, Online:
IEEE. https://doi.org/10.1109/EDTM50988.2021.9420817'
chicago: Gao, Fei, Jie Yin Zhang, Jian Huan Wang, Ming Ming, Tina Wang, Jian Jun
Zhang, Hannes Watzinger, et al. “Ge/Si Quantum Wires for Quantum Computing.” In
2021 5th IEEE Electron Devices Technology and Manufacturing Conference, EDTM
2021. IEEE, 2021. https://doi.org/10.1109/EDTM50988.2021.9420817.
ieee: F. Gao et al., “Ge/Si quantum wires for quantum computing,” in 2021
5th IEEE Electron Devices Technology and Manufacturing Conference, EDTM 2021,
Virtual, Online, 2021.
ista: 'Gao F, Zhang JY, Wang JH, Ming M, Wang T, Zhang JJ, Watzinger H, Kukucka
J, Vukušić L, Katsaros G, Wang K, Xu G, Li HO, Guo GP. 2021. Ge/Si quantum wires
for quantum computing. 2021 5th IEEE Electron Devices Technology and Manufacturing
Conference, EDTM 2021. EDTM: IEEE Electron Devices Technology and Manufacturing
Conference, 9420817.'
mla: Gao, Fei, et al. “Ge/Si Quantum Wires for Quantum Computing.” 2021 5th IEEE
Electron Devices Technology and Manufacturing Conference, EDTM 2021, 9420817,
IEEE, 2021, doi:10.1109/EDTM50988.2021.9420817.
short: F. Gao, J.Y. Zhang, J.H. Wang, M. Ming, T. Wang, J.J. Zhang, H. Watzinger,
J. Kukucka, L. Vukušić, G. Katsaros, K. Wang, G. Xu, H.O. Li, G.P. Guo, in:, 2021
5th IEEE Electron Devices Technology and Manufacturing Conference, EDTM 2021,
IEEE, 2021.
conference:
end_date: 2021-04-11
location: Virtual, Online
name: 'EDTM: IEEE Electron Devices Technology and Manufacturing Conference'
start_date: 2021-04-08
date_created: 2021-06-06T22:01:29Z
date_published: 2021-04-08T00:00:00Z
date_updated: 2023-10-03T12:51:59Z
day: '08'
department:
- _id: GeKa
doi: 10.1109/EDTM50988.2021.9420817
ec_funded: 1
external_id:
isi:
- '000675595800006'
isi: 1
language:
- iso: eng
month: '04'
oa_version: None
project:
- _id: 25517E86-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '335497'
name: Towards Spin qubits and Majorana fermions in Germanium selfassembled hut-wires
publication: 2021 5th IEEE Electron Devices Technology and Manufacturing Conference,
EDTM 2021
publication_identifier:
isbn:
- '9781728181769'
publication_status: published
publisher: IEEE
quality_controlled: '1'
scopus_import: '1'
status: public
title: Ge/Si quantum wires for quantum computing
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2021'
...
---
_id: '8909'
abstract:
- lang: eng
text: Spin qubits are considered to be among the most promising candidates for building
a quantum processor. Group IV hole spin qubits have moved into the focus of interest
due to the ease of operation and compatibility with Si technology. In addition,
Ge offers the option for monolithic superconductor-semiconductor integration.
Here we demonstrate a hole spin qubit operating at fields below 10 mT, the critical
field of Al, by exploiting the large out-of-plane hole g-factors in planar Ge
and by encoding the qubit into the singlet-triplet states of a double quantum
dot. We observe electrically controlled X and Z-rotations with tunable frequencies
exceeding 100 MHz and dephasing times of 1μs which we extend beyond 15μs with
echo techniques. These results show that Ge hole singlet triplet qubits outperform
their electronic Si and GaAs based counterparts in speed and coherence, respectively.
In addition, they are on par with Ge single spin qubits, but can be operated at
much lower fields underlining their potential for on chip integration with superconducting
technologies.
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
acknowledgement: This research was supported by the Scientific Service Units of Institute
of Science and Technology (IST) Austria through resources provided by the Miba Machine
Shop and the nanofabrication facility, and was made possible with the support of
the NOMIS Foundation. This project has received funding from the European Union’s
Horizon 2020 research and innovation programme under Marie Sklodowska-Curie grant
agreements no. 844511 and no. 75441, and by the Austrian Science Fund FWF-P 30207
project. A.B. acknowledges support from the European Union Horizon 2020 FET project
microSPIRE, no. 766955. M. Botifoll and J.A. acknowledge funding from Generalitat
de Catalunya 2017 SGR 327. The Catalan Institute of Nanoscience and Nanotechnology
(ICN2) is supported by the Severo Ochoa programme from the Spanish Ministery of
Economy (MINECO) (grant no. SEV-2017-0706) and is funded by the Catalonian Research
Centre (CERCA) Programme, Generalitat de Catalunya. Part of the present work has
been performed within the framework of the Universitat Autónoma de Barcelona Materials
Science PhD programme. Part of the HAADF scanning transmission electron microscopy
was conducted in the Laboratorio de Microscopias Avanzadas at Instituto de Nanociencia
de Aragon, Universidad de Zaragoza. ICN2 acknowledge support from the Spanish Superior
Council of Scientific Research (CSIC) Research Platform on Quantum Technologies
PTI-001. M.B. acknowledges funding from the Catalan Agency for Management of University
and Research Grants (AGAUR) Generalitat de Catalunya formation of investigators
(FI) PhD grant.
article_processing_charge: No
article_type: original
author:
- first_name: Daniel
full_name: Jirovec, Daniel
id: 4C473F58-F248-11E8-B48F-1D18A9856A87
last_name: Jirovec
orcid: 0000-0002-7197-4801
- first_name: Andrea C
full_name: Hofmann, Andrea C
id: 340F461A-F248-11E8-B48F-1D18A9856A87
last_name: Hofmann
- first_name: Andrea
full_name: Ballabio, Andrea
last_name: Ballabio
- first_name: Philipp M.
full_name: Mutter, Philipp M.
last_name: Mutter
- first_name: Giulio
full_name: Tavani, Giulio
last_name: Tavani
- first_name: Marc
full_name: Botifoll, Marc
last_name: Botifoll
- first_name: Alessandro
full_name: Crippa, Alessandro
id: 1F2B21A2-F6E7-11E9-9B82-F7DBE5697425
last_name: Crippa
orcid: 0000-0002-2968-611X
- first_name: Josip
full_name: Kukucka, Josip
id: 3F5D8856-F248-11E8-B48F-1D18A9856A87
last_name: Kukucka
- first_name: Oliver
full_name: Sagi, Oliver
id: 71616374-A8E9-11E9-A7CA-09ECE5697425
last_name: Sagi
- first_name: Frederico
full_name: Martins, Frederico
id: 38F80F9A-1CB8-11EA-BC76-B49B3DDC885E
last_name: Martins
orcid: 0000-0003-2668-2401
- first_name: Jaime
full_name: Saez Mollejo, Jaime
id: e0390f72-f6e0-11ea-865d-862393336714
last_name: Saez Mollejo
- first_name: Ivan
full_name: Prieto Gonzalez, Ivan
id: 2A307FE2-F248-11E8-B48F-1D18A9856A87
last_name: Prieto Gonzalez
orcid: 0000-0002-7370-5357
- first_name: Maksim
full_name: Borovkov, Maksim
id: 2ac7a0a2-3562-11eb-9256-fbd18ea55087
last_name: Borovkov
- first_name: Jordi
full_name: Arbiol, Jordi
last_name: Arbiol
- first_name: Daniel
full_name: Chrastina, Daniel
last_name: Chrastina
- first_name: Giovanni
full_name: Isella, Giovanni
last_name: Isella
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
citation:
ama: Jirovec D, Hofmann AC, Ballabio A, et al. A singlet triplet hole spin qubit
in planar Ge. Nature Materials. 2021;20(8):1106–1112. doi:10.1038/s41563-021-01022-2
apa: Jirovec, D., Hofmann, A. C., Ballabio, A., Mutter, P. M., Tavani, G., Botifoll,
M., … Katsaros, G. (2021). A singlet triplet hole spin qubit in planar Ge. Nature
Materials. Springer Nature. https://doi.org/10.1038/s41563-021-01022-2
chicago: Jirovec, Daniel, Andrea C Hofmann, Andrea Ballabio, Philipp M. Mutter,
Giulio Tavani, Marc Botifoll, Alessandro Crippa, et al. “A Singlet Triplet Hole
Spin Qubit in Planar Ge.” Nature Materials. Springer Nature, 2021. https://doi.org/10.1038/s41563-021-01022-2.
ieee: D. Jirovec et al., “A singlet triplet hole spin qubit in planar Ge,”
Nature Materials, vol. 20, no. 8. Springer Nature, pp. 1106–1112, 2021.
ista: Jirovec D, Hofmann AC, Ballabio A, Mutter PM, Tavani G, Botifoll M, Crippa
A, Kukucka J, Sagi O, Martins F, Saez Mollejo J, Prieto Gonzalez I, Borovkov M,
Arbiol J, Chrastina D, Isella G, Katsaros G. 2021. A singlet triplet hole spin
qubit in planar Ge. Nature Materials. 20(8), 1106–1112.
mla: Jirovec, Daniel, et al. “A Singlet Triplet Hole Spin Qubit in Planar Ge.” Nature
Materials, vol. 20, no. 8, Springer Nature, 2021, pp. 1106–1112, doi:10.1038/s41563-021-01022-2.
short: D. Jirovec, A.C. Hofmann, A. Ballabio, P.M. Mutter, G. Tavani, M. Botifoll,
A. Crippa, J. Kukucka, O. Sagi, F. Martins, J. Saez Mollejo, I. Prieto Gonzalez,
M. Borovkov, J. Arbiol, D. Chrastina, G. Isella, G. Katsaros, Nature Materials
20 (2021) 1106–1112.
date_created: 2020-12-02T10:50:47Z
date_published: 2021-08-01T00:00:00Z
date_updated: 2024-03-28T23:30:27Z
day: '01'
department:
- _id: GeKa
- _id: NanoFab
- _id: GradSch
doi: 10.1038/s41563-021-01022-2
ec_funded: 1
external_id:
arxiv:
- '2011.13755'
isi:
- '000657596400001'
intvolume: ' 20'
isi: 1
issue: '8'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/2011.13755
month: '08'
oa: 1
oa_version: Preprint
page: 1106–1112
project:
- _id: 26A151DA-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '844511'
name: Majorana bound states in Ge/SiGe heterostructures
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
- _id: 2641CE5E-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P30207
name: Hole spin orbit qubits in Ge quantum wells
- _id: 262116AA-B435-11E9-9278-68D0E5697425
name: Hybrid Semiconductor - Superconductor Quantum Devices
publication: Nature Materials
publication_identifier:
eissn:
- 1476-4660
issn:
- 1476-1122
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
link:
- description: News on IST Homepage
relation: press_release
url: https://ist.ac.at/en/news/quantum-computing-with-holes/
record:
- id: '9323'
relation: research_data
status: public
- id: '10058'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: A singlet triplet hole spin qubit in planar Ge
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 20
year: '2021'
...
---
_id: '7996'
abstract:
- lang: eng
text: "Quantum computation enables the execution of algorithms that have exponential
complexity. This might open the path towards the synthesis of new materials or
medical drugs, optimization of transport or financial strategies etc., intractable
on even the fastest classical computers. A quantum computer consists of interconnected
two level quantum systems, called qubits, that satisfy DiVincezo’s criteria. Worldwide,
there are ongoing efforts to find the qubit architecture which will unite quantum
error correction compatible single and two qubit fidelities, long distance qubit
to qubit coupling and \r\n calability. Superconducting qubits have gone the furthest
in this race, demonstrating an algorithm running on 53 coupled qubits, but still
the fidelities are not even close to those required for realizing a single logical
qubit. emiconductor qubits offer extremely good characteristics, but they are
currently investigated across different platforms. Uniting those good characteristics
into a single platform might be a big step towards the quantum computer realization.\r\nHere
we describe the implementation of a hole spin qubit hosted in a Ge hut wire double
quantum dot. The high and tunable spin-orbit coupling together with a heavy hole
state character is expected to allow fast spin manipulation and long coherence
times. Furthermore large lever arms, for hut wire devices, should allow good coupling
to superconducting resonators enabling efficient long distance spin to spin coupling
and a sensitive gate reflectometry spin readout. The developed cryogenic setup
(printed circuit board sample holders, filtering, high-frequency wiring) enabled
us to perform low temperature spin dynamics experiments. Indeed, we measured the
fastest single spin qubit Rabi frequencies reported so far, reaching 140 MHz,
while the dephasing times of 130 ns oppose the long decoherence predictions. In
order to further investigate this, a double quantum dot gate was connected directly
to a lumped element\r\nresonator which enabled gate reflectometry readout. The
vanishing inter-dot transition signal, for increasing external magnetic field,
revealed the spin nature of the measured quantity."
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Josip
full_name: Kukucka, Josip
id: 3F5D8856-F248-11E8-B48F-1D18A9856A87
last_name: Kukucka
citation:
ama: Kukucka J. Implementation of a hole spin qubit in Ge hut wires and dispersive
spin sensing. 2020. doi:10.15479/AT:ISTA:7996
apa: Kukucka, J. (2020). Implementation of a hole spin qubit in Ge hut wires
and dispersive spin sensing. Institute of Science and Technology Austria.
https://doi.org/10.15479/AT:ISTA:7996
chicago: Kukucka, Josip. “Implementation of a Hole Spin Qubit in Ge Hut Wires and
Dispersive Spin Sensing.” Institute of Science and Technology Austria, 2020. https://doi.org/10.15479/AT:ISTA:7996.
ieee: J. Kukucka, “Implementation of a hole spin qubit in Ge hut wires and dispersive
spin sensing,” Institute of Science and Technology Austria, 2020.
ista: Kukucka J. 2020. Implementation of a hole spin qubit in Ge hut wires and dispersive
spin sensing. Institute of Science and Technology Austria.
mla: Kukucka, Josip. Implementation of a Hole Spin Qubit in Ge Hut Wires and
Dispersive Spin Sensing. Institute of Science and Technology Austria, 2020,
doi:10.15479/AT:ISTA:7996.
short: J. Kukucka, Implementation of a Hole Spin Qubit in Ge Hut Wires and Dispersive
Spin Sensing, Institute of Science and Technology Austria, 2020.
date_created: 2020-06-22T09:22:23Z
date_published: 2020-06-22T00:00:00Z
date_updated: 2023-09-26T15:50:22Z
day: '22'
ddc:
- '530'
degree_awarded: PhD
department:
- _id: GeKa
doi: 10.15479/AT:ISTA:7996
file:
- access_level: closed
checksum: 467e52feb3e361ce8cf5fe8d5c254ece
content_type: application/x-zip-compressed
creator: dernst
date_created: 2020-06-22T09:22:04Z
date_updated: 2020-07-14T12:48:07Z
file_id: '7997'
file_name: JK_thesis_latex_source_files.zip
file_size: 392794743
relation: main_file
- access_level: open_access
checksum: 1de716bf110dbd77d383e479232bf496
content_type: application/pdf
creator: dernst
date_created: 2020-06-22T09:21:29Z
date_updated: 2020-07-14T12:48:07Z
file_id: '7998'
file_name: PhD_thesis_JK_pdfa.pdf
file_size: 28453247
relation: main_file
file_date_updated: 2020-07-14T12:48:07Z
has_accepted_license: '1'
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
page: '178'
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
record:
- id: '1328'
relation: part_of_dissertation
status: public
- id: '7541'
relation: part_of_dissertation
status: public
- id: '77'
relation: part_of_dissertation
status: public
- id: '23'
relation: part_of_dissertation
status: public
- id: '840'
relation: part_of_dissertation
status: public
status: public
supervisor:
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
title: Implementation of a hole spin qubit in Ge hut wires and dispersive spin sensing
type: dissertation
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2020'
...
---
_id: '7541'
abstract:
- lang: eng
text: Semiconductor nanowires have been playing a crucial role in the development
of nanoscale devices for the realization of spin qubits, Majorana fermions, single
photon emitters, nanoprocessors, etc. The monolithic growth of site‐controlled
nanowires is a prerequisite toward the next generation of devices that will require
addressability and scalability. Here, combining top‐down nanofabrication and bottom‐up
self‐assembly, the growth of Ge wires on prepatterned Si (001) substrates with
controllable position, distance, length, and structure is reported. This is achieved
by a novel growth process that uses a SiGe strain‐relaxation template and can
be potentially generalized to other material combinations. Transport measurements
show an electrically tunable spin–orbit coupling, with a spin–orbit length similar
to that of III–V materials. Also, charge sensing between quantum dots in closely
spaced wires is observed, which underlines their potential for the realization
of advanced quantum devices. The reported results open a path toward scalable
qubit devices using nanowires on silicon.
acknowledged_ssus:
- _id: NanoFab
- _id: M-Shop
acknowledgement: 'This work was supported by the National Key R&D Program of China
(Grant Nos. 2016YFA0301701 and 2016YFA0300600), the NSFC (Grant Nos. 11574356, 11434010,
and 11404252), the Strategic Priority Research Program of CAS (Grant No. XDB30000000),
the ERC Starting Grant No. 335497, the FWF P32235 project, and the European Union''s
Horizon 2020 research and innovation program under Grant Agreement #862046. This
research was supported by the Scientific Service Units of IST Austria through resources
provided by the MIBA Machine Shop and the nanofabrication facility. F.L. thanks
support from DOE (Grant No. DE‐FG02‐04ER46148). H.H. thanks the Startup Funding
from Xi''an Jiaotong University.'
article_number: '1906523'
article_processing_charge: Yes (via OA deal)
article_type: original
author:
- first_name: Fei
full_name: Gao, Fei
last_name: Gao
- first_name: Jian-Huan
full_name: Wang, Jian-Huan
last_name: Wang
- first_name: Hannes
full_name: Watzinger, Hannes
id: 35DF8E50-F248-11E8-B48F-1D18A9856A87
last_name: Watzinger
- first_name: Hao
full_name: Hu, Hao
last_name: Hu
- first_name: Marko J.
full_name: Rančić, Marko J.
last_name: Rančić
- first_name: Jie-Yin
full_name: Zhang, Jie-Yin
last_name: Zhang
- first_name: Ting
full_name: Wang, Ting
last_name: Wang
- first_name: Yuan
full_name: Yao, Yuan
last_name: Yao
- first_name: Gui-Lei
full_name: Wang, Gui-Lei
last_name: Wang
- first_name: Josip
full_name: Kukucka, Josip
id: 3F5D8856-F248-11E8-B48F-1D18A9856A87
last_name: Kukucka
- first_name: Lada
full_name: Vukušić, Lada
id: 31E9F056-F248-11E8-B48F-1D18A9856A87
last_name: Vukušić
orcid: 0000-0003-2424-8636
- first_name: Christoph
full_name: Kloeffel, Christoph
last_name: Kloeffel
- first_name: Daniel
full_name: Loss, Daniel
last_name: Loss
- first_name: Feng
full_name: Liu, Feng
last_name: Liu
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
- first_name: Jian-Jun
full_name: Zhang, Jian-Jun
last_name: Zhang
citation:
ama: Gao F, Wang J-H, Watzinger H, et al. Site-controlled uniform Ge/Si hut wires
with electrically tunable spin-orbit coupling. Advanced Materials. 2020;32(16).
doi:10.1002/adma.201906523
apa: Gao, F., Wang, J.-H., Watzinger, H., Hu, H., Rančić, M. J., Zhang, J.-Y., …
Zhang, J.-J. (2020). Site-controlled uniform Ge/Si hut wires with electrically
tunable spin-orbit coupling. Advanced Materials. Wiley. https://doi.org/10.1002/adma.201906523
chicago: Gao, Fei, Jian-Huan Wang, Hannes Watzinger, Hao Hu, Marko J. Rančić, Jie-Yin
Zhang, Ting Wang, et al. “Site-Controlled Uniform Ge/Si Hut Wires with Electrically
Tunable Spin-Orbit Coupling.” Advanced Materials. Wiley, 2020. https://doi.org/10.1002/adma.201906523.
ieee: F. Gao et al., “Site-controlled uniform Ge/Si hut wires with electrically
tunable spin-orbit coupling,” Advanced Materials, vol. 32, no. 16. Wiley,
2020.
ista: Gao F, Wang J-H, Watzinger H, Hu H, Rančić MJ, Zhang J-Y, Wang T, Yao Y, Wang
G-L, Kukucka J, Vukušić L, Kloeffel C, Loss D, Liu F, Katsaros G, Zhang J-J. 2020.
Site-controlled uniform Ge/Si hut wires with electrically tunable spin-orbit coupling.
Advanced Materials. 32(16), 1906523.
mla: Gao, Fei, et al. “Site-Controlled Uniform Ge/Si Hut Wires with Electrically
Tunable Spin-Orbit Coupling.” Advanced Materials, vol. 32, no. 16, 1906523,
Wiley, 2020, doi:10.1002/adma.201906523.
short: F. Gao, J.-H. Wang, H. Watzinger, H. Hu, M.J. Rančić, J.-Y. Zhang, T. Wang,
Y. Yao, G.-L. Wang, J. Kukucka, L. Vukušić, C. Kloeffel, D. Loss, F. Liu, G. Katsaros,
J.-J. Zhang, Advanced Materials 32 (2020).
date_created: 2020-02-28T09:47:00Z
date_published: 2020-04-23T00:00:00Z
date_updated: 2024-02-21T12:42:12Z
day: '23'
ddc:
- '530'
department:
- _id: GeKa
doi: 10.1002/adma.201906523
ec_funded: 1
external_id:
isi:
- '000516660900001'
file:
- access_level: open_access
checksum: c622737dc295972065782558337124a2
content_type: application/pdf
creator: dernst
date_created: 2020-11-20T10:11:35Z
date_updated: 2020-11-20T10:11:35Z
file_id: '8782'
file_name: 2020_AdvancedMaterials_Gao.pdf
file_size: 5242880
relation: main_file
success: 1
file_date_updated: 2020-11-20T10:11:35Z
has_accepted_license: '1'
intvolume: ' 32'
isi: 1
issue: '16'
language:
- iso: eng
month: '04'
oa: 1
oa_version: Published Version
project:
- _id: 25517E86-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '335497'
name: Towards Spin qubits and Majorana fermions in Germanium selfassembled hut-wires
- _id: 237B3DA4-32DE-11EA-91FC-C7463DDC885E
call_identifier: FWF
grant_number: P32235
name: Towards scalable hut wire quantum devices
- _id: 237E5020-32DE-11EA-91FC-C7463DDC885E
call_identifier: H2020
grant_number: '862046'
name: TOPOLOGICALLY PROTECTED AND SCALABLE QUANTUM BITS
publication: Advanced Materials
publication_identifier:
issn:
- 0935-9648
publication_status: published
publisher: Wiley
quality_controlled: '1'
related_material:
record:
- id: '7996'
relation: dissertation_contains
status: public
- id: '9222'
relation: research_data
status: public
scopus_import: '1'
status: public
title: Site-controlled uniform Ge/Si hut wires with electrically tunable spin-orbit
coupling
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 32
year: '2020'
...
---
_id: '8203'
abstract:
- lang: eng
text: Using inelastic cotunneling spectroscopy we observe a zero field splitting
within the spin triplet manifold of Ge hut wire quantum dots. The states with
spin ±1 in the confinement direction are energetically favored by up to 55 μeV
compared to the spin 0 triplet state because of the strong spin–orbit coupling.
The reported effect should be observable in a broad class of strongly confined
hole quantum-dot systems and might need to be considered when operating hole spin
qubits.
acknowledged_ssus:
- _id: NanoFab
- _id: M-Shop
acknowledgement: "We acknowledge G. Burkard, V. N. Golovach, C. Kloeffel, D.Loss,
P. Rabl, and M. Rancič ́ for helpful discussions. We\r\nfurther acknowledge T.
Adletzberger, J. Aguilera, T. Asenov, S. Bagiante, T. Menner, L. Shafeek, P. Taus,
P. Traunmüller, and D. Waldhausl for their invaluable assistance. This research
was supported by the Scientific Service Units of IST Austria through resources provided
by the MIBA Machine Shop and the nanofabrication facility, by the FWF-P 32235 project,
by the National Key R&D Program of China (2016YFA0301701, 2016YFA0300600), and by
the European Union’s Horizon 2020 research and innovation program under grant agreement
no. 862046. All data of this publication are available at 10.15479/AT:ISTA:7689."
article_processing_charge: Yes (via OA deal)
article_type: original
author:
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
- first_name: Josip
full_name: Kukucka, Josip
id: 3F5D8856-F248-11E8-B48F-1D18A9856A87
last_name: Kukucka
- first_name: Lada
full_name: Vukušić, Lada
id: 31E9F056-F248-11E8-B48F-1D18A9856A87
last_name: Vukušić
orcid: 0000-0003-2424-8636
- first_name: Hannes
full_name: Watzinger, Hannes
id: 35DF8E50-F248-11E8-B48F-1D18A9856A87
last_name: Watzinger
- first_name: Fei
full_name: Gao, Fei
last_name: Gao
- first_name: Ting
full_name: Wang, Ting
last_name: Wang
orcid: 0000-0002-4619-9575
- first_name: Jian-Jun
full_name: Zhang, Jian-Jun
last_name: Zhang
- first_name: Karsten
full_name: Held, Karsten
last_name: Held
citation:
ama: Katsaros G, Kukucka J, Vukušić L, et al. Zero field splitting of heavy-hole
states in quantum dots. Nano Letters. 2020;20(7):5201-5206. doi:10.1021/acs.nanolett.0c01466
apa: Katsaros, G., Kukucka, J., Vukušić, L., Watzinger, H., Gao, F., Wang, T., …
Held, K. (2020). Zero field splitting of heavy-hole states in quantum dots. Nano
Letters. American Chemical Society. https://doi.org/10.1021/acs.nanolett.0c01466
chicago: Katsaros, Georgios, Josip Kukucka, Lada Vukušić, Hannes Watzinger, Fei
Gao, Ting Wang, Jian-Jun Zhang, and Karsten Held. “Zero Field Splitting of Heavy-Hole
States in Quantum Dots.” Nano Letters. American Chemical Society, 2020.
https://doi.org/10.1021/acs.nanolett.0c01466.
ieee: G. Katsaros et al., “Zero field splitting of heavy-hole states in quantum
dots,” Nano Letters, vol. 20, no. 7. American Chemical Society, pp. 5201–5206,
2020.
ista: Katsaros G, Kukucka J, Vukušić L, Watzinger H, Gao F, Wang T, Zhang J-J, Held
K. 2020. Zero field splitting of heavy-hole states in quantum dots. Nano Letters.
20(7), 5201–5206.
mla: Katsaros, Georgios, et al. “Zero Field Splitting of Heavy-Hole States in Quantum
Dots.” Nano Letters, vol. 20, no. 7, American Chemical Society, 2020, pp.
5201–06, doi:10.1021/acs.nanolett.0c01466.
short: G. Katsaros, J. Kukucka, L. Vukušić, H. Watzinger, F. Gao, T. Wang, J.-J.
Zhang, K. Held, Nano Letters 20 (2020) 5201–5206.
date_created: 2020-08-06T09:25:04Z
date_published: 2020-06-01T00:00:00Z
date_updated: 2024-02-21T12:44:01Z
day: '01'
ddc:
- '530'
department:
- _id: GeKa
doi: 10.1021/acs.nanolett.0c01466
ec_funded: 1
external_id:
isi:
- '000548893200066'
pmid:
- '32479090'
file:
- access_level: open_access
content_type: application/pdf
creator: dernst
date_created: 2020-08-06T09:35:37Z
date_updated: 2020-08-06T09:35:37Z
file_id: '8204'
file_name: 2020_NanoLetters_Katsaros.pdf
file_size: 3308906
relation: main_file
success: 1
file_date_updated: 2020-08-06T09:35:37Z
has_accepted_license: '1'
intvolume: ' 20'
isi: 1
issue: '7'
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
page: 5201-5206
pmid: 1
project:
- _id: 237B3DA4-32DE-11EA-91FC-C7463DDC885E
call_identifier: FWF
grant_number: P32235
name: Towards scalable hut wire quantum devices
- _id: 237E5020-32DE-11EA-91FC-C7463DDC885E
call_identifier: H2020
grant_number: '862046'
name: TOPOLOGICALLY PROTECTED AND SCALABLE QUANTUM BITS
publication: Nano Letters
publication_identifier:
eissn:
- 1530-6992
issn:
- 1530-6984
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
related_material:
record:
- id: '7689'
relation: research_data
status: public
scopus_import: '1'
status: public
title: Zero field splitting of heavy-hole states in quantum dots
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 20
year: '2020'
...
---
_id: '77'
abstract:
- lang: eng
text: Holes confined in quantum dots have gained considerable interest in the past
few years due to their potential as spin qubits. Here we demonstrate two-axis
control of a spin 3/2 qubit in natural Ge. The qubit is formed in a hut wire double
quantum dot device. The Pauli spin blockade principle allowed us to demonstrate
electric dipole spin resonance by applying a radio frequency electric field to
one of the electrodes defining the double quantum dot. Coherent hole spin oscillations
with Rabi frequencies reaching 140 MHz are demonstrated and dephasing times of
130 ns are measured. The reported results emphasize the potential of Ge as a platform
for fast and electrically tunable hole spin qubit devices.
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
article_processing_charge: Yes
article_type: original
author:
- first_name: Hannes
full_name: Watzinger, Hannes
id: 35DF8E50-F248-11E8-B48F-1D18A9856A87
last_name: Watzinger
- first_name: Josip
full_name: Kukucka, Josip
id: 3F5D8856-F248-11E8-B48F-1D18A9856A87
last_name: Kukucka
- first_name: Lada
full_name: Vukusic, Lada
id: 31E9F056-F248-11E8-B48F-1D18A9856A87
last_name: Vukusic
orcid: 0000-0003-2424-8636
- first_name: Fei
full_name: Gao, Fei
last_name: Gao
- first_name: Ting
full_name: Wang, Ting
last_name: Wang
- first_name: Friedrich
full_name: Schäffler, Friedrich
last_name: Schäffler
- first_name: Jian
full_name: Zhang, Jian
last_name: Zhang
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
citation:
ama: Watzinger H, Kukucka J, Vukušić L, et al. A germanium hole spin qubit. Nature
Communications. 2018;9(3902). doi:10.1038/s41467-018-06418-4
apa: Watzinger, H., Kukucka, J., Vukušić, L., Gao, F., Wang, T., Schäffler, F.,
… Katsaros, G. (2018). A germanium hole spin qubit. Nature Communications.
Nature Publishing Group. https://doi.org/10.1038/s41467-018-06418-4
chicago: Watzinger, Hannes, Josip Kukucka, Lada Vukušić, Fei Gao, Ting Wang, Friedrich
Schäffler, Jian Zhang, and Georgios Katsaros. “A Germanium Hole Spin Qubit.” Nature
Communications. Nature Publishing Group, 2018. https://doi.org/10.1038/s41467-018-06418-4.
ieee: H. Watzinger et al., “A germanium hole spin qubit,” Nature Communications,
vol. 9, no. 3902. Nature Publishing Group, 2018.
ista: Watzinger H, Kukucka J, Vukušić L, Gao F, Wang T, Schäffler F, Zhang J, Katsaros
G. 2018. A germanium hole spin qubit. Nature Communications. 9(3902).
mla: Watzinger, Hannes, et al. “A Germanium Hole Spin Qubit.” Nature Communications,
vol. 9, no. 3902, Nature Publishing Group, 2018, doi:10.1038/s41467-018-06418-4.
short: H. Watzinger, J. Kukucka, L. Vukušić, F. Gao, T. Wang, F. Schäffler, J. Zhang,
G. Katsaros, Nature Communications 9 (2018).
date_created: 2018-12-11T11:44:30Z
date_published: 2018-09-25T00:00:00Z
date_updated: 2023-09-08T11:44:02Z
day: '25'
ddc:
- '530'
department:
- _id: GeKa
doi: 10.1038/s41467-018-06418-4
ec_funded: 1
external_id:
isi:
- '000445560800010'
file:
- access_level: open_access
checksum: e7148c10a64497e279c4de570b6cc544
content_type: application/pdf
creator: dernst
date_created: 2018-12-17T10:28:30Z
date_updated: 2020-07-14T12:48:02Z
file_id: '5687'
file_name: 2018_NatureComm_Watzinger.pdf
file_size: 1063469
relation: main_file
file_date_updated: 2020-07-14T12:48:02Z
has_accepted_license: '1'
intvolume: ' 9'
isi: 1
issue: '3902 '
language:
- iso: eng
month: '09'
oa: 1
oa_version: Published Version
project:
- _id: 25517E86-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '335497'
name: Towards Spin qubits and Majorana fermions in Germanium selfassembled hut-wires
- _id: 2552F888-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: Y00715
name: Loch Spin-Qubits und Majorana-Fermionen in Germanium
publication: Nature Communications
publication_status: published
publisher: Nature Publishing Group
quality_controlled: '1'
related_material:
record:
- id: '7977'
relation: popular_science
- id: '7996'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: A germanium hole spin qubit
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 9
year: '2018'
...
---
_id: '23'
abstract:
- lang: eng
text: The strong atomistic spin–orbit coupling of holes makes single-shot spin readout
measurements difficult because it reduces the spin lifetimes. By integrating the
charge sensor into a high bandwidth radio frequency reflectometry setup, we were
able to demonstrate single-shot readout of a germanium quantum dot hole spin and
measure the spin lifetime. Hole spin relaxation times of about 90 μs at 500 mT
are reported, with a total readout visibility of about 70%. By analyzing separately
the spin-to-charge conversion and charge readout fidelities, we have obtained
insight into the processes limiting the visibilities of hole spins. The analyses
suggest that high hole visibilities are feasible at realistic experimental conditions,
underlying the potential of hole spins for the realization of viable qubit devices.
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
article_processing_charge: No
author:
- first_name: Lada
full_name: Vukušić, Lada
id: 31E9F056-F248-11E8-B48F-1D18A9856A87
last_name: Vukušić
orcid: 0000-0003-2424-8636
- first_name: Josip
full_name: Kukucka, Josip
id: 3F5D8856-F248-11E8-B48F-1D18A9856A87
last_name: Kukucka
- first_name: Hannes
full_name: Watzinger, Hannes
id: 35DF8E50-F248-11E8-B48F-1D18A9856A87
last_name: Watzinger
- first_name: Joshua M
full_name: Milem, Joshua M
id: 4CDE0A96-F248-11E8-B48F-1D18A9856A87
last_name: Milem
- first_name: Friedrich
full_name: Schäffler, Friedrich
last_name: Schäffler
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
citation:
ama: Vukušić L, Kukucka J, Watzinger H, Milem JM, Schäffler F, Katsaros G. Single-shot
readout of hole spins in Ge. Nano Letters. 2018;18(11):7141-7145. doi:10.1021/acs.nanolett.8b03217
apa: Vukušić, L., Kukucka, J., Watzinger, H., Milem, J. M., Schäffler, F., &
Katsaros, G. (2018). Single-shot readout of hole spins in Ge. Nano Letters.
American Chemical Society. https://doi.org/10.1021/acs.nanolett.8b03217
chicago: Vukušić, Lada, Josip Kukucka, Hannes Watzinger, Joshua M Milem, Friedrich
Schäffler, and Georgios Katsaros. “Single-Shot Readout of Hole Spins in Ge.” Nano
Letters. American Chemical Society, 2018. https://doi.org/10.1021/acs.nanolett.8b03217.
ieee: L. Vukušić, J. Kukucka, H. Watzinger, J. M. Milem, F. Schäffler, and G. Katsaros,
“Single-shot readout of hole spins in Ge,” Nano Letters, vol. 18, no. 11.
American Chemical Society, pp. 7141–7145, 2018.
ista: Vukušić L, Kukucka J, Watzinger H, Milem JM, Schäffler F, Katsaros G. 2018.
Single-shot readout of hole spins in Ge. Nano Letters. 18(11), 7141–7145.
mla: Vukušić, Lada, et al. “Single-Shot Readout of Hole Spins in Ge.” Nano Letters,
vol. 18, no. 11, American Chemical Society, 2018, pp. 7141–45, doi:10.1021/acs.nanolett.8b03217.
short: L. Vukušić, J. Kukucka, H. Watzinger, J.M. Milem, F. Schäffler, G. Katsaros,
Nano Letters 18 (2018) 7141–7145.
date_created: 2018-12-11T11:44:13Z
date_published: 2018-10-25T00:00:00Z
date_updated: 2023-09-18T09:30:37Z
day: '25'
ddc:
- '530'
department:
- _id: GeKa
doi: 10.1021/acs.nanolett.8b03217
ec_funded: 1
external_id:
isi:
- '000451102100064'
pmid:
- '30359041'
file:
- access_level: open_access
checksum: 3e6034a94c6b5335e939145d88bdb371
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:16:08Z
date_updated: 2020-07-14T12:45:37Z
file_id: '5194'
file_name: IST-2018-1065-v1+1_ACS_nanoletters_8b03217.pdf
file_size: 1361441
relation: main_file
file_date_updated: 2020-07-14T12:45:37Z
has_accepted_license: '1'
intvolume: ' 18'
isi: 1
issue: '11'
language:
- iso: eng
month: '10'
oa: 1
oa_version: Published Version
page: 7141 - 7145
pmid: 1
project:
- _id: 25517E86-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '335497'
name: Towards Spin qubits and Majorana fermions in Germanium selfassembled hut-wires
publication: Nano Letters
publication_identifier:
issn:
- '15306984'
publication_status: published
publisher: American Chemical Society
publist_id: '8032'
pubrep_id: '1065'
quality_controlled: '1'
related_material:
record:
- id: '7977'
relation: popular_science
- id: '69'
relation: dissertation_contains
status: public
- id: '7996'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Single-shot readout of hole spins in Ge
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 18
year: '2018'
...
---
_id: '840'
abstract:
- lang: eng
text: Heavy holes confined in quantum dots are predicted to be promising candidates
for the realization of spin qubits with long coherence times. Here we focus on
such heavy-hole states confined in germanium hut wires. By tuning the growth density
of the latter we can realize a T-like structure between two neighboring wires.
Such a structure allows the realization of a charge sensor, which is electrostatically
and tunnel coupled to a quantum dot, with charge-transfer signals as high as 0.3
e. By integrating the T-like structure into a radiofrequency reflectometry setup,
single-shot measurements allowing the extraction of hole tunneling times are performed.
The extracted tunneling times of less than 10 μs are attributed to the small effective
mass of Ge heavy-hole states and pave the way toward projective spin readout measurements.
acknowledged_ssus:
- _id: M-Shop
article_processing_charge: No
author:
- first_name: Lada
full_name: Vukusic, Lada
id: 31E9F056-F248-11E8-B48F-1D18A9856A87
last_name: Vukusic
orcid: 0000-0003-2424-8636
- first_name: Josip
full_name: Kukucka, Josip
id: 3F5D8856-F248-11E8-B48F-1D18A9856A87
last_name: Kukucka
- first_name: Hannes
full_name: Watzinger, Hannes
id: 35DF8E50-F248-11E8-B48F-1D18A9856A87
last_name: Watzinger
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
citation:
ama: Vukušić L, Kukucka J, Watzinger H, Katsaros G. Fast hole tunneling times in
germanium hut wires probed by single-shot reflectometry. Nano Letters.
2017;17(9):5706-5710. doi:10.1021/acs.nanolett.7b02627
apa: Vukušić, L., Kukucka, J., Watzinger, H., & Katsaros, G. (2017). Fast hole
tunneling times in germanium hut wires probed by single-shot reflectometry. Nano
Letters. American Chemical Society. https://doi.org/10.1021/acs.nanolett.7b02627
chicago: Vukušić, Lada, Josip Kukucka, Hannes Watzinger, and Georgios Katsaros.
“Fast Hole Tunneling Times in Germanium Hut Wires Probed by Single-Shot Reflectometry.”
Nano Letters. American Chemical Society, 2017. https://doi.org/10.1021/acs.nanolett.7b02627.
ieee: L. Vukušić, J. Kukucka, H. Watzinger, and G. Katsaros, “Fast hole tunneling
times in germanium hut wires probed by single-shot reflectometry,” Nano Letters,
vol. 17, no. 9. American Chemical Society, pp. 5706–5710, 2017.
ista: Vukušić L, Kukucka J, Watzinger H, Katsaros G. 2017. Fast hole tunneling times
in germanium hut wires probed by single-shot reflectometry. Nano Letters. 17(9),
5706–5710.
mla: Vukušić, Lada, et al. “Fast Hole Tunneling Times in Germanium Hut Wires Probed
by Single-Shot Reflectometry.” Nano Letters, vol. 17, no. 9, American Chemical
Society, 2017, pp. 5706–10, doi:10.1021/acs.nanolett.7b02627.
short: L. Vukušić, J. Kukucka, H. Watzinger, G. Katsaros, Nano Letters 17 (2017)
5706–5710.
date_created: 2018-12-11T11:48:47Z
date_published: 2017-08-10T00:00:00Z
date_updated: 2023-09-26T15:50:22Z
day: '10'
ddc:
- '539'
department:
- _id: GeKa
doi: 10.1021/acs.nanolett.7b02627
ec_funded: 1
external_id:
isi:
- '000411043500078'
file:
- access_level: open_access
checksum: 761371a0129b2aa442424b9561450ece
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:12:33Z
date_updated: 2020-07-14T12:48:13Z
file_id: '4951'
file_name: IST-2017-865-v1+1_acs.nanolett.7b02627.pdf
file_size: 2449546
relation: main_file
file_date_updated: 2020-07-14T12:48:13Z
has_accepted_license: '1'
intvolume: ' 17'
isi: 1
issue: '9'
language:
- iso: eng
month: '08'
oa: 1
oa_version: Published Version
page: 5706 - 5710
project:
- _id: 25517E86-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '335497'
name: Towards Spin qubits and Majorana fermions in Germanium selfassembled hut-wires
publication: Nano Letters
publication_identifier:
issn:
- '15306984'
publication_status: published
publisher: American Chemical Society
publist_id: '6808'
pubrep_id: '865'
quality_controlled: '1'
related_material:
record:
- id: '7977'
relation: popular_science
- id: '69'
relation: dissertation_contains
status: public
- id: '7996'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Fast hole tunneling times in germanium hut wires probed by single-shot reflectometry
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 17
year: '2017'
...
---
_id: '1328'
abstract:
- lang: eng
text: Hole spins have gained considerable interest in the past few years due to
their potential for fast electrically controlled qubits. Here, we study holes
confined in Ge hut wires, a so-far unexplored type of nanostructure. Low-temperature
magnetotransport measurements reveal a large anisotropy between the in-plane and
out-of-plane g-factors of up to 18. Numerical simulations verify that this large
anisotropy originates from a confined wave function of heavy-hole character. A
light-hole admixture of less than 1% is estimated for the states of lowest energy,
leading to a surprisingly large reduction of the out-of-plane g-factors compared
with those for pure heavy holes. Given this tiny light-hole contribution, the
spin lifetimes are expected to be very long, even in isotopically nonpurified
samples.
acknowledgement: 'The work was supported by the EC FP7 ICT project SiSPIN no. 323841,
the EC FP7 ICT project PAMS no. 610446, the ERC Starting Grant no. 335497, the FWF-I-1190-N20
project, and the Swiss NSF. We acknowledge F. Schäffler for fruitful discussions
related to the hut wire growth and for giving us access to the molecular beam epitaxy
system, M. Schatzl for her support in electron beam lithography, and V. Jadris ̌ko
for helping us with the COMSOL simulations. Finally, we thank G. Bauer for his continuous
support. '
author:
- first_name: Hannes
full_name: Watzinger, Hannes
id: 35DF8E50-F248-11E8-B48F-1D18A9856A87
last_name: Watzinger
- first_name: Christoph
full_name: Kloeffel, Christoph
last_name: Kloeffel
- first_name: Lada
full_name: Vukusic, Lada
id: 31E9F056-F248-11E8-B48F-1D18A9856A87
last_name: Vukusic
orcid: 0000-0003-2424-8636
- first_name: Marta
full_name: Rossell, Marta
last_name: Rossell
- first_name: Violetta
full_name: Sessi, Violetta
last_name: Sessi
- first_name: Josip
full_name: Kukucka, Josip
id: 3F5D8856-F248-11E8-B48F-1D18A9856A87
last_name: Kukucka
- first_name: Raimund
full_name: Kirchschlager, Raimund
last_name: Kirchschlager
- first_name: Elisabeth
full_name: Lausecker, Elisabeth
id: 33662F76-F248-11E8-B48F-1D18A9856A87
last_name: Lausecker
- first_name: Alisha
full_name: Truhlar, Alisha
id: 49CBC780-F248-11E8-B48F-1D18A9856A87
last_name: Truhlar
- first_name: Martin
full_name: Glaser, Martin
last_name: Glaser
- first_name: Armando
full_name: Rastelli, Armando
last_name: Rastelli
- first_name: Andreas
full_name: Fuhrer, Andreas
last_name: Fuhrer
- first_name: Daniel
full_name: Loss, Daniel
last_name: Loss
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
citation:
ama: Watzinger H, Kloeffel C, Vukušić L, et al. Heavy-hole states in germanium hut
wires. Nano Letters. 2016;16(11):6879-6885. doi:10.1021/acs.nanolett.6b02715
apa: Watzinger, H., Kloeffel, C., Vukušić, L., Rossell, M., Sessi, V., Kukucka,
J., … Katsaros, G. (2016). Heavy-hole states in germanium hut wires. Nano Letters.
American Chemical Society. https://doi.org/10.1021/acs.nanolett.6b02715
chicago: Watzinger, Hannes, Christoph Kloeffel, Lada Vukušić, Marta Rossell, Violetta
Sessi, Josip Kukucka, Raimund Kirchschlager, et al. “Heavy-Hole States in Germanium
Hut Wires.” Nano Letters. American Chemical Society, 2016. https://doi.org/10.1021/acs.nanolett.6b02715.
ieee: H. Watzinger et al., “Heavy-hole states in germanium hut wires,” Nano
Letters, vol. 16, no. 11. American Chemical Society, pp. 6879–6885, 2016.
ista: Watzinger H, Kloeffel C, Vukušić L, Rossell M, Sessi V, Kukucka J, Kirchschlager
R, Lausecker E, Truhlar A, Glaser M, Rastelli A, Fuhrer A, Loss D, Katsaros G.
2016. Heavy-hole states in germanium hut wires. Nano Letters. 16(11), 6879–6885.
mla: Watzinger, Hannes, et al. “Heavy-Hole States in Germanium Hut Wires.” Nano
Letters, vol. 16, no. 11, American Chemical Society, 2016, pp. 6879–85, doi:10.1021/acs.nanolett.6b02715.
short: H. Watzinger, C. Kloeffel, L. Vukušić, M. Rossell, V. Sessi, J. Kukucka,
R. Kirchschlager, E. Lausecker, A. Truhlar, M. Glaser, A. Rastelli, A. Fuhrer,
D. Loss, G. Katsaros, Nano Letters 16 (2016) 6879–6885.
date_created: 2018-12-11T11:51:24Z
date_published: 2016-09-22T00:00:00Z
date_updated: 2023-09-07T13:15:02Z
day: '22'
ddc:
- '539'
department:
- _id: GeKa
doi: 10.1021/acs.nanolett.6b02715
ec_funded: 1
file:
- access_level: open_access
checksum: b63feece90d7b620ece49ca632e34ff3
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:14:04Z
date_updated: 2020-07-14T12:44:44Z
file_id: '5053'
file_name: IST-2016-664-v1+1_acs.nanolett.6b02715.pdf
file_size: 535121
relation: main_file
file_date_updated: 2020-07-14T12:44:44Z
has_accepted_license: '1'
intvolume: ' 16'
issue: '11'
language:
- iso: eng
month: '09'
oa: 1
oa_version: Published Version
page: 6879 - 6885
project:
- _id: 25517E86-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '335497'
name: Towards Spin qubits and Majorana fermions in Germanium selfassembled hut-wires
publication: Nano Letters
publication_status: published
publisher: American Chemical Society
publist_id: '5941'
pubrep_id: '664'
quality_controlled: '1'
related_material:
record:
- id: '7977'
relation: popular_science
status: for_moderation
- id: '7996'
relation: dissertation_contains
status: public
scopus_import: 1
status: public
title: Heavy-hole states in germanium hut wires
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 16
year: '2016'
...