Closing of the induced gap in a hybrid superconductor-semiconductor nanowire

Puglia D, Martinez EA, Ménard GC, Pöschl A, Gronin S, Gardner GC, Kallaher R, Manfra MJ, Marcus CM, Higginbotham AP, Casparis L. 2021. Closing of the induced gap in a hybrid superconductor-semiconductor nanowire. Physical Review B. 103(23), 235201.


Journal Article | Published | English

Scopus indexed
Author
Puglia, DeniseIST Austria; Martinez, E. A.; Ménard, G. C.; Pöschl, A.; Gronin, S.; Gardner, G. C.; Kallaher, R.; Manfra, M. J.; Marcus, C. M.; Higginbotham, Andrew PIST Austria ; Casparis, L.
Department
Abstract
We present conductance-matrix measurements in long, three-terminal hybrid superconductor-semiconductor nanowires, and compare with theoretical predictions of a magnetic-field-driven, topological quantum phase transition. By examining the nonlocal conductance, we identify the closure of the excitation gap in the bulk of the semiconductor before the emergence of zero-bias peaks, ruling out spurious gap-closure signatures from localized states. We observe that after the gap closes, nonlocal signals and zero-bias peaks fluctuate strongly at both ends, inconsistent with a simple picture of clean topological superconductivity.
Publishing Year
Date Published
2021-06-15
Journal Title
Physical Review B
Acknowledgement
We acknowledge insightful discussions with K. Flensberg, E. B. Hansen, T. Karzig, R. Lutchyn, D. Pikulin, E. Prada, and R. Aguado. This work was supported by Microsoft Project Q and the Danmarks Grundforskningsfond. C.M.M. acknowledges support from the Villum Fonden. A.P.H. and L.C. contributed equally to this work.
Volume
103
Issue
23
Article Number
235201
ISSN
eISSN
IST-REx-ID

Cite this

Puglia D, Martinez EA, Ménard GC, et al. Closing of the induced gap in a hybrid superconductor-semiconductor nanowire. Physical Review B. 2021;103(23). doi:10.1103/PhysRevB.103.235201
Puglia, D., Martinez, E. A., Ménard, G. C., Pöschl, A., Gronin, S., Gardner, G. C., … Casparis, L. (2021). Closing of the induced gap in a hybrid superconductor-semiconductor nanowire. Physical Review B. American Physical Society. https://doi.org/10.1103/PhysRevB.103.235201
Puglia, Denise, E. A. Martinez, G. C. Ménard, A. Pöschl, S. Gronin, G. C. Gardner, R. Kallaher, et al. “Closing of the Induced Gap in a Hybrid Superconductor-Semiconductor Nanowire.” Physical Review B. American Physical Society, 2021. https://doi.org/10.1103/PhysRevB.103.235201.
D. Puglia et al., “Closing of the induced gap in a hybrid superconductor-semiconductor nanowire,” Physical Review B, vol. 103, no. 23. American Physical Society, 2021.
Puglia D, Martinez EA, Ménard GC, Pöschl A, Gronin S, Gardner GC, Kallaher R, Manfra MJ, Marcus CM, Higginbotham AP, Casparis L. 2021. Closing of the induced gap in a hybrid superconductor-semiconductor nanowire. Physical Review B. 103(23), 235201.
Puglia, Denise, et al. “Closing of the Induced Gap in a Hybrid Superconductor-Semiconductor Nanowire.” Physical Review B, vol. 103, no. 23, 235201, American Physical Society, 2021, doi:10.1103/PhysRevB.103.235201.
All files available under the following license(s):
Copyright Statement:
This Item is protected by copyright and/or related rights. [...]

Link(s) to Main File(s)
Access Level
OA Open Access

Export

Marked Publications

Open Data IST Research Explorer

Sources

arXiv 2006.01275

Search this title in

Google Scholar