Väyrynen, Jukka I. and Pikulin, Dmitry I. and Alicea, Jason (2018) Noise-Induced Backscattering in a Quantum Spin Hall Edge. Physical Review Letters, 121 (10). Art. No. 106601. ISSN 0031-9007. doi:10.1103/PhysRevLett.121.106601. https://resolver.caltech.edu/CaltechAUTHORS:20180906-130214378
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Abstract
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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| Additional Information: | © 2018 American Physical Society. Received 31 May 2018; published 6 September 2018. We thank Gijs de Lange and John Watson for helpful discussions and especially thank Leonid Glazman for his perceptive insights. We also gratefully acknowledge support from the National Science Foundation through Grant No. DMR-1723367; the Caltech Institute for Quantum Information and Matter, a NSF Physics Frontiers Center with support of the Gordon and Betty Moore Foundation through Grant No. GBMF1250; and the Walter Burke Institute for Theoretical Physics at Caltech. | ||||||||||
| Group: | Walter Burke Institute for Theoretical Physics, Institute for Quantum Information and Matter | ||||||||||
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| Issue or Number: | 10 | ||||||||||
| DOI: | 10.1103/PhysRevLett.121.106601 | ||||||||||
| Record Number: | CaltechAUTHORS:20180906-130214378 | ||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20180906-130214378 | ||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||
| ID Code: | 89417 | ||||||||||
| Collection: | CaltechAUTHORS | ||||||||||
| Deposited By: | Tony Diaz | ||||||||||
| Deposited On: | 07 Sep 2018 00:06 | ||||||||||
| Last Modified: | 16 Nov 2021 00:35 |
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