---
_id: '392'
abstract:
- lang: eng
text: We used femtosecond optical pump-probe spectroscopy to study the photoinduced
change in reflectivity of thin films of the electron-doped cuprate La2-xCexCuO4
(LCCO) with dopings of x=0.08 (underdoped) and x=0.11 (optimally doped). Above
Tc, we observe fluence-dependent relaxation rates that begin at a temperature
similar to the one where transport measurements first show signatures of antiferromagnetic
correlations. Upon suppressing superconductivity with a magnetic field, it is
found that the fluence and temperature dependence of relaxation rates are consistent
with bimolecular recombination of electrons and holes across a gap (2ΔAF) originating
from antiferromagnetic correlations which comprise the pseudogap in electron-doped
cuprates. This can be used to learn about coupling between electrons and high-energy
(ω>2ΔAF) excitations in these compounds and set limits on the time scales on
which antiferromagnetic correlations are static.
acknowledgement: Optical pump-probe work was supported by the Gordon and Betty Moore
Foundation's EPiQS initiative through Grant No. GBMF4540. Materials growth and characterization
was supported by AFOSR FA95501410332 and NSF DMR1410665.
author:
- first_name: Inna
full_name: Vishik, Inna
last_name: Vishik
- first_name: Fahad
full_name: Mahmood, Fahad
last_name: Mahmood
- first_name: Zhanybek
full_name: Alpichshev, Zhanybek
id: 45E67A2A-F248-11E8-B48F-1D18A9856A87
last_name: Alpichshev
orcid: 0000-0002-7183-5203
- first_name: Nuh
full_name: Gedik, Nuh
last_name: Gedik
- first_name: Joshu
full_name: Higgins, Joshu
last_name: Higgins
- first_name: Richard
full_name: Greene, Richard
last_name: Greene
citation:
ama: Vishik I, Mahmood F, Alpichshev Z, Gedik N, Higgins J, Greene R. Ultrafast
dynamics in the presence of antiferromagnetic correlations in electron doped cuprate
La2 xCexCuO4±δ. Physical Review B. 2017;95(11). doi:10.1103/PhysRevB.95.115125
apa: Vishik, I., Mahmood, F., Alpichshev, Z., Gedik, N., Higgins, J., & Greene,
R. (2017). Ultrafast dynamics in the presence of antiferromagnetic correlations
in electron doped cuprate La2 xCexCuO4±δ. Physical Review B. American Physical
Society. https://doi.org/10.1103/PhysRevB.95.115125
chicago: Vishik, Inna, Fahad Mahmood, Zhanybek Alpichshev, Nuh Gedik, Joshu Higgins,
and Richard Greene. “Ultrafast Dynamics in the Presence of Antiferromagnetic Correlations
in Electron Doped Cuprate La2 XCexCuO4±δ.” Physical Review B. American
Physical Society, 2017. https://doi.org/10.1103/PhysRevB.95.115125.
ieee: I. Vishik, F. Mahmood, Z. Alpichshev, N. Gedik, J. Higgins, and R. Greene,
“Ultrafast dynamics in the presence of antiferromagnetic correlations in electron
doped cuprate La2 xCexCuO4±δ,” Physical Review B, vol. 95, no. 11. American
Physical Society, 2017.
ista: Vishik I, Mahmood F, Alpichshev Z, Gedik N, Higgins J, Greene R. 2017. Ultrafast
dynamics in the presence of antiferromagnetic correlations in electron doped cuprate
La2 xCexCuO4±δ. Physical Review B. 95(11).
mla: Vishik, Inna, et al. “Ultrafast Dynamics in the Presence of Antiferromagnetic
Correlations in Electron Doped Cuprate La2 XCexCuO4±δ.” Physical Review B,
vol. 95, no. 11, American Physical Society, 2017, doi:10.1103/PhysRevB.95.115125.
short: I. Vishik, F. Mahmood, Z. Alpichshev, N. Gedik, J. Higgins, R. Greene, Physical
Review B 95 (2017).
date_created: 2018-12-11T11:46:13Z
date_published: 2017-03-13T00:00:00Z
date_updated: 2021-01-12T07:53:12Z
day: '13'
doi: 10.1103/PhysRevB.95.115125
extern: '1'
intvolume: ' 95'
issue: '11'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://dspace.mit.edu/handle/1721.1/109835
month: '03'
oa: 1
oa_version: None
publication: Physical Review B
publication_status: published
publisher: American Physical Society
publist_id: '7437'
status: public
title: Ultrafast dynamics in the presence of antiferromagnetic correlations in electron
doped cuprate La2 xCexCuO4±δ
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 95
year: '2017'
...