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

Chang, Cui -Zu; Zhao, Weiwei; Li, Jian; Jain, J. K.; Liu, Chaoxing; Moodera, Jagadeesh S.; Chan, Moses H. W.

doi:10.1103/PhysRevLett.117.126802

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

Journal Article · 14 September 2016 · Physical Review Letters

DOI: https://doi.org/10.1103/PhysRevLett.117.126802 · OSTI ID:1489117

Chang, Cui -Zu ^[1]; Zhao, Weiwei ^[2]; Li, Jian ^[3]; Jain, J. K. ^[2]; Liu, Chaoxing ^[2]; Moodera, Jagadeesh S. ^[4]; Chan, Moses H. W. ^[2]

Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); The Pennsylvania State Univ., University Park, PA (United States)
The Pennsylvania State Univ., University Park, PA (United States)
Princeton Univ., Princeton, NJ (United States)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

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 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 (QAH) 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. Furthermore, we expect that our work will motivate much further investigation of many properties of quantum phase transition in this new context.

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Research Organization:: Pennsylvania State Univ., University Park, PA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0005042

OSTI ID:: 1489117

Alternate ID(s):: OSTI ID: 1324496

Journal Information:: Physical Review Letters, Vol. 117, Issue 12; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 47 works

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