期刊
PHYSICAL REVIEW LETTERS
卷 121, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.121.106601
关键词
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资金
- National Science Foundation [DMR-1723367]
- Caltech Institute for Quantum Information and Matter, a NSF Physics Frontiers Center
- Gordon and Betty Moore Foundation [GBMF1250]
- Walter Burke Institute for Theoretical Physics at Caltech
Time-reversal symmetry suppresses electron backscattering in a quantum-spin-Hall edge, yielding quantized conductance at zero temperature. Understanding the dominant corrections in finite-temperature experiments remains an unsettled issue. We study a novel mechanism for conductance suppression: backscattering caused by incoherent electromagnetic noise. Specifically, we show that an electric potential fluctuating randomly in time can backscatter electrons inelastically without constraints faced by electron-electron interactions. We quantify noise-induced corrections to the dc conductance in various regimes and propose an experiment to test this scenario.
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