Anomalous helical edge states in a non-Hermitian Chern insulator

被引：168

作者：

Kawabata, Kohei ^{[1
]}

Shiozaki, Ken ^{[2
]}

Ueda, Masahito ^{[1
,3
]}

机构：

[1] Univ Tokyo, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan

[2] RIKEN, Condensed Matter Theory Lab, Wako, Saitama 3510198, Japan

[3] RIKEN, CEMS, Wako, Saitama 3510198, Japan

来源：

PHYSICAL REVIEW B | 2018年 / 98卷 / 16期

基金：

日本学术振兴会;

关键词：

PARITY-TIME SYMMETRY; QUANTIZED HALL CONDUCTANCE; EXCEPTIONAL POINTS; BOUND-STATES; BACKSCATTERING; REALIZATION; TRANSITION; FERMIONS; PHYSICS; NUMBER;

D O I：

10.1103/PhysRevB.98.165148

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A non-Hermitian extension of a Chern insulator and its bulk-boundary correspondence are investigated. It is shown that in addition to the robust chiral edge states that reflect the nontrivial topology of the bulk (nonzero Chern number), anomalous helical edge states localized only at one edge can appear, which are unique to the non-Hermitian Chern insulator.

引用

页数：12

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