Disordered quantum transport in quantum anomalous Hall insulator-superconductor junctions
Abstract
In this work we numerically studied disordered quantum transport in a quantum anomalous Hall insulator-superconductor junction based on the effective edge model approach. In particular, we focus on the parameter regime with the mean-free path due to elastic scattering much smaller than the sample size and superconductor coherence length, and discuss disordered transport behavior in the presence of different numbers of chiral edge modes, as well as nonchiral metallic modes. Our numerical results demonstrate that the presence of multiple chiral edge modes or nonchiral metallic modes will lead to a strong Andreev conversion, giving rise to half-electron half-hole transmission through the junction structure, in sharp contrast to the suppression of Andreev conversion in the single chiral edge mode case. Finally, our results suggest the importance of additional transport modes in the quantum anomalous Hall insulator-superconductor junction and will guide future transport measurements.
- Authors:
-
- Pennsylvania State Univ., University Park, PA (United States)
- Publication Date:
- Research Org.:
- Pennsylvania State Univ., University Park, PA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1783179
- Grant/Contract Number:
- SC0019064
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 102; Journal Issue: 14; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Zhang, Jian-Xiao, and Liu, Chao-Xing. Disordered quantum transport in quantum anomalous Hall insulator-superconductor junctions. United States: N. p., 2020.
Web. doi:10.1103/physrevb.102.144513.
Zhang, Jian-Xiao, & Liu, Chao-Xing. Disordered quantum transport in quantum anomalous Hall insulator-superconductor junctions. United States. https://doi.org/10.1103/physrevb.102.144513
Zhang, Jian-Xiao, and Liu, Chao-Xing. Thu .
"Disordered quantum transport in quantum anomalous Hall insulator-superconductor junctions". United States. https://doi.org/10.1103/physrevb.102.144513. https://www.osti.gov/servlets/purl/1783179.
@article{osti_1783179,
title = {Disordered quantum transport in quantum anomalous Hall insulator-superconductor junctions},
author = {Zhang, Jian-Xiao and Liu, Chao-Xing},
abstractNote = {In this work we numerically studied disordered quantum transport in a quantum anomalous Hall insulator-superconductor junction based on the effective edge model approach. In particular, we focus on the parameter regime with the mean-free path due to elastic scattering much smaller than the sample size and superconductor coherence length, and discuss disordered transport behavior in the presence of different numbers of chiral edge modes, as well as nonchiral metallic modes. Our numerical results demonstrate that the presence of multiple chiral edge modes or nonchiral metallic modes will lead to a strong Andreev conversion, giving rise to half-electron half-hole transmission through the junction structure, in sharp contrast to the suppression of Andreev conversion in the single chiral edge mode case. Finally, our results suggest the importance of additional transport modes in the quantum anomalous Hall insulator-superconductor junction and will guide future transport measurements.},
doi = {10.1103/physrevb.102.144513},
journal = {Physical Review B},
number = 14,
volume = 102,
place = {United States},
year = {Thu Oct 15 00:00:00 EDT 2020},
month = {Thu Oct 15 00:00:00 EDT 2020}
}
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