Current-induced breakdown of the quantum anomalous Hall effect - Kölner UniversitätsPublikationsServer

Lippertz, Gertjan ORCID: 0000-0002-4061-7027, Bliesener, Andrea, Uday, Anjana ORCID: 0000-0002-9719-0458, Pereira, Lino M. C., Taskin, A. A. and Ando, Yoichi ORCID: 0000-0002-3553-3355 (2022). Current-induced breakdown of the quantum anomalous Hall effect. Phys. Rev. B, 106 (4). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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DOI:10.1103/PhysRevB.106.045419

Abstract

The quantum anomalous Hall effect (QAHE) realizes dissipationless longitudinal resistivity and quantized Hall resistance without the need of an external magnetic field. However, when reducing the device dimensions or increasing the current density, an abrupt breakdown of the dissipationless state occurs with a relatively small critical current, limiting the applications of the QAHE. We investigate the mechanism of this breakdown by studying multiterminal devices and identified that the electric field created between opposing chiral edge states lies at the origin. We propose that electric-field-driven percolation of two-dimensional charge puddles in the gapped surface states of compensated topological-insulator films is the most likely cause of the breakdown.

Item Type:

Journal Article

Creators:

Creators	Email	ORCID	ORCID Put Code
Lippertz, Gertjan	UNSPECIFIED	orcid.org/0000-0002-4061-7027	UNSPECIFIED
Bliesener, Andrea	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Uday, Anjana	UNSPECIFIED	orcid.org/0000-0002-9719-0458	UNSPECIFIED
Pereira, Lino M. C.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Taskin, A. A.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Ando, Yoichi	UNSPECIFIED	orcid.org/0000-0002-3553-3355	UNSPECIFIED