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. doi:10.1103/PhysRevLett.123.046801. https://resolver.caltech.edu/CaltechAUTHORS:20190426-083534979

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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:

URL	URL Type	Description
https://doi.org/10.1103/PhysRevLett.123.046801	DOI	Article
https://arxiv.org/abs/1903.05089	arXiv	Discussion Paper

ORCID:

Author	ORCID
Alicea, Jason	0000-0001-9979-3423

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:

Institute for Quantum Information and Matter, Walter Burke Institute for Theoretical Physics

Funders:

Funding Agency	Grant Number
Army Research Office (ARO)	W911NF-17-1-0323
NSF	DMR-1723367
Institute for Quantum Information and Matter (IQIM)	UNSPECIFIED
Gordon and Betty Moore Foundation	GBMF1250
Walter Burke Institute for Theoretical Physics, Caltech	UNSPECIFIED

Issue or Number:

DOI:

10.1103/PhysRevLett.123.046801

Record Number:

CaltechAUTHORS:20190426-083534979

Persistent URL:

https://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:

16 Nov 2021 17:09

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