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

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

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number126802
JournalPhysical review letters
Volume117
Issue number12
DOIs
StatePublished - Sep 14 2016

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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