Chiral topological superconductor and half-integer conductance plateau from quantum anomalous Hall plateau transition
Abstract
Here, we propose to realize a two-dimensional chiral topological superconducting (TSC) state from the quantum anomalous Hall plateau transition in a magnetic topological insulator thin film through the proximity effect to a conventional s -wave superconductor. This state has a full pairing gap in the bulk and a single chiral Majorana mode at the edge. The optimal condition for realizing such chiral TSC is to have inequivalent superconducting pairing amplitudes on top and bottom surfaces of the doped magnetic topological insulator. We further propose several transport experiments to detect the chiral TSC. One unique signature is that the conductance will be quantized into a half-integer plateau at the coercive field in this hybrid system. In particular, with the point contact formed by a superconducting junction, the conductance oscillates between e2 /2h and e2 /h with the frequency determined by the voltage across the junction. We close by discussing the feasibility of these experimental proposals.
- Authors:
-
- Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Stanford Univ., Stanford, CA (United States)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1326857
- Alternate Identifier(s):
- OSTI ID: 1213610
- Report Number(s):
- SLAC-PUB-16713
Journal ID: ISSN 1098-0121; PRBMDO
- Grant/Contract Number:
- AC02-76SF00515
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. B, Condensed Matter and Materials Physics
- Additional Journal Information:
- Journal Volume: 92; Journal Issue: 6; Journal ID: ISSN 1098-0121
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Wang, Jing, Zhou, Quan, Lian, Biao, and Zhang, Shou -Cheng. Chiral topological superconductor and half-integer conductance plateau from quantum anomalous Hall plateau transition. United States: N. p., 2015.
Web. doi:10.1103/PhysRevB.92.064520.
Wang, Jing, Zhou, Quan, Lian, Biao, & Zhang, Shou -Cheng. Chiral topological superconductor and half-integer conductance plateau from quantum anomalous Hall plateau transition. United States. https://doi.org/10.1103/PhysRevB.92.064520
Wang, Jing, Zhou, Quan, Lian, Biao, and Zhang, Shou -Cheng. Mon .
"Chiral topological superconductor and half-integer conductance plateau from quantum anomalous Hall plateau transition". United States. https://doi.org/10.1103/PhysRevB.92.064520. https://www.osti.gov/servlets/purl/1326857.
@article{osti_1326857,
title = {Chiral topological superconductor and half-integer conductance plateau from quantum anomalous Hall plateau transition},
author = {Wang, Jing and Zhou, Quan and Lian, Biao and Zhang, Shou -Cheng},
abstractNote = {Here, we propose to realize a two-dimensional chiral topological superconducting (TSC) state from the quantum anomalous Hall plateau transition in a magnetic topological insulator thin film through the proximity effect to a conventional s -wave superconductor. This state has a full pairing gap in the bulk and a single chiral Majorana mode at the edge. The optimal condition for realizing such chiral TSC is to have inequivalent superconducting pairing amplitudes on top and bottom surfaces of the doped magnetic topological insulator. We further propose several transport experiments to detect the chiral TSC. One unique signature is that the conductance will be quantized into a half-integer plateau at the coercive field in this hybrid system. In particular, with the point contact formed by a superconducting junction, the conductance oscillates between e2 /2h and e2 /h with the frequency determined by the voltage across the junction. We close by discussing the feasibility of these experimental proposals.},
doi = {10.1103/PhysRevB.92.064520},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 6,
volume = 92,
place = {United States},
year = {2015},
month = {8}
}
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