Quantum Anomalous Hall Insulator of Composite Fermions

被引：9

作者：

Zhang, Yinhan ^{[1
]}

Shi, Junren ^{[2
,3
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[2] Peking Univ, Int Ctr Quantum Mat, Beijing 100871, Peoples R China

[3] Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 01期

基金：

美国国家科学基金会;

关键词：

FILLED LANDAU-LEVEL; MAGNETIC-FIELDS; SYSTEM; PHASE; ELECTRONS; SURFACE; LIQUID;

D O I：

10.1103/PhysRevLett.113.016801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that a weak hexagonal periodic potential can transform a two-dimensional electron gas with an even-denominator magnetic filling factor into an quantum anomalous hall insulator of composite fermions, giving rise to the fractionally quantized Hall effect. The system provides a realization of the Haldane honeycomb-net model, albeit in a composite fermion system. We further propose a trial wave function for the state, and numerically evaluate its relative stability against the competing Hofstadter state. Possible sets of experimental parameters are proposed.

引用

页数：5

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