Quantum Anomalous Parity Hall Effect in Magnetically Disordered Topological Insulator Films

被引：45

作者：

Haim, Arbel ^{[1
,2
,3
]}

Ilan, Roni ^{[4
]}

Alicea, Jason ^{[1
,2
,3
]}

机构：

[1] CALTECH, Dept Phys, Pasadena, CA 91125 USA

[2] CALTECH, Inst Quantum Informat & Matter, Pasadena, CA 91125 USA

[3] CALTECH, Walter Burke Inst Theoret Phys, Pasadena, CA 91125 USA

[4] Tel Aviv Univ, Raymond & Beverly Sackler Sch Phys & Astron, IL-69978 Tel Aviv, Israel

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 123卷 / 04期

关键词：

SINGLE DIRAC CONE; STATE; LOCALIZATION; REALIZATION; BI2SE3;

D O I：

10.1103/PhysRevLett.123.046801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：6

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