CaltechAUTHORS
  A Caltech Library Service

Quantum anomalous parity Hall effect in magnetically disordered topological insulator films

Haim, Arbel and Ilan, Roni and Alicea, Jason (2019) Quantum anomalous parity Hall effect in magnetically disordered topological insulator films. Physical Review Letters, 123 (4). Art. No. 046801. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:20190426-083534979

[img] PDF - Published Version
See Usage Policy.

546Kb
[img] PDF - Submitted Version
See Usage Policy.

1558Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20190426-083534979

Abstract

In magnetically doped thin-film topological insulators, aligning the magnetic moments generates a quantum anomalous Hall phase supporting a single chiral edge state. We show that as the system demagnetizes, disorder from randomly oriented magnetic moments can produce a “quantum anomalous parity Hall” phase with helical edge modes protected by a unitary reflection symmetry. We further show that introducing superconductivity, combined with selective breaking of reflection symmetry by a gate, allows for creation and manipulation of Majorana zero modes via purely electrical means and at zero applied magnetic field.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1103/PhysRevLett.123.046801DOIArticle
https://arxiv.org/abs/1903.05089arXivDiscussion Paper
Additional Information:© 2019 American Physical Society. Received 21 March 2019; published 22 July 2019. We thank A. Thomson for her insightful comments. We acknowledge support from the Army Research Office under Grant Award No. W911NF-17-1-0323 (J. A.), the NSF through Grant No. DMR-1723367 (J. A.), the Caltech Institute for Quantum Information and Matter, an NSF Physics Frontiers Center with support of the Gordon and Betty Moore Foundation through Grant No. GBMF1250 (J. A.), and the Walter Burke Institute for Theoretical Physics at Caltech (J. A. and A. H.).
Group:IQIM, Institute for Quantum Information and Matter, Walter Burke Institute for Theoretical Physics
Funders:
Funding AgencyGrant Number
Army Research Office (ARO)W911NF-17-1-0323
NSFDMR-1723367
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
Gordon and Betty Moore FoundationGBMF1250
Walter Burke Institute for Theoretical Physics, CaltechUNSPECIFIED
Issue or Number:4
Record Number:CaltechAUTHORS:20190426-083534979
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20190426-083534979
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95009
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:26 Apr 2019 16:23
Last Modified:22 Jul 2019 16:19

Repository Staff Only: item control page