CaltechAUTHORS
  A Caltech Library Service

Noise-Induced Backscattering in a Quantum Spin Hall Edge

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. http://resolver.caltech.edu/CaltechAUTHORS:20180906-130214378

[img] PDF - Published Version
See Usage Policy.

223Kb
[img] PDF - Submitted Version
See Usage Policy.

448Kb
[img] PDF (includes calculation of noise from fluctuating dipoles in the dielectric as well as a quantum mechanical treatment of w(t)) - Supplemental Material
See Usage Policy.

221Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20180906-130214378

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.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1103/PhysRevLett.121.106601DOIArticle
https://arxiv.org/abs/1803.01021arXivDiscussion Paper
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, IQIM
Funders:
Funding AgencyGrant Number
NSFDMR-1723367
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
Gordon and Betty Moore FoundationGBMF1250
Walter Burke Institute for Theoretical Physics, CaltechUNSPECIFIED
Record Number:CaltechAUTHORS:20180906-130214378
Persistent URL:http://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:07 Sep 2018 00:06

Repository Staff Only: item control page