Observation of the Quantum Anomalous Hall Insulator to Anderson Insulator Quantum Phase Transition and its Scaling Behavior

被引：57

作者：

Chang, Cui-Zu ^{[1
,2
,3
]}

Zhao, Weiwei ^{[2
,3
]}

Li, Jian ^{[4
]}

Jain, J. K. ^{[2
,3
]}

Liu, Chaoxing ^{[2
,3
]}

Moodera, Jagadeesh S. ^{[1
,5
]}

Chan, Moses H. W. ^{[2
,3
]}

机构：

[1] MIT, Francis Bitter Magnet Lab, Cambridge, MA 02139 USA

[2] Penn State Univ, Ctr Nanoscale Sci, University Pk, PA 16802 USA

[3] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

[4] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

[5] MIT, Dept Phys, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 117卷 / 12期

基金：

美国国家科学基金会;

关键词：

STATE;

D O I：

10.1103/PhysRevLett.117.126802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Fundamental insight into the nature of the quantum phase transition from a superconductor to an insulator in two dimensions, or from one plateau to the next or to an insulator in the quantum Hall effect, has been revealed through the study of its scaling behavior. Here, we report on the experimental observation of a quantum phase transition from a quantum-anomalous-Hall insulator to an Anderson insulator in a magnetic topological insulator by tuning the chemical potential. Our experiment demonstrates the existence of scaling behavior from which we extract the critical exponent for this quantum phase transition. We expect that our work will motivate much further investigation of many properties of quantum phase transition in this new context.

引用

页数：5

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