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

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.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [2] ;  [4] ;  [2]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); The Pennsylvania State Univ., University Park, PA (United States)
  2. The Pennsylvania State Univ., University Park, PA (United States)
  3. Princeton Univ., Princeton, NJ (United States)
  4. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Publication Date:
Grant/Contract Number:
SC0005042
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 117; Journal Issue: 12; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Pennsylvania State Univ., University Park, PA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; quantum anomalous Hall effect; Anderson insulator
OSTI Identifier:
1489117
Alternate Identifier(s):
OSTI ID: 1324496

Chang, Cui -Zu, Zhao, Weiwei, Li, Jian, Jain, J. K., Liu, Chaoxing, Moodera, Jagadeesh S., and Chan, Moses H. W.. Observation of the Quantum Anomalous Hall Insulator to Anderson Insulator Quantum Phase Transition and its Scaling Behavior. United States: N. p., Web. doi:10.1103/PhysRevLett.117.126802.
Chang, Cui -Zu, Zhao, Weiwei, Li, Jian, Jain, J. K., Liu, Chaoxing, Moodera, Jagadeesh S., & Chan, Moses H. W.. Observation of the Quantum Anomalous Hall Insulator to Anderson Insulator Quantum Phase Transition and its Scaling Behavior. United States. doi:10.1103/PhysRevLett.117.126802.
Chang, Cui -Zu, Zhao, Weiwei, Li, Jian, Jain, J. K., Liu, Chaoxing, Moodera, Jagadeesh S., and Chan, Moses H. W.. 2016. "Observation of the Quantum Anomalous Hall Insulator to Anderson Insulator Quantum Phase Transition and its Scaling Behavior". United States. doi:10.1103/PhysRevLett.117.126802. https://www.osti.gov/servlets/purl/1489117.
@article{osti_1489117,
title = {Observation of the Quantum Anomalous Hall Insulator to Anderson Insulator Quantum Phase Transition and its Scaling Behavior},
author = {Chang, Cui -Zu and Zhao, Weiwei and Li, Jian and Jain, J. K. and Liu, Chaoxing and Moodera, Jagadeesh S. and Chan, Moses H. W.},
abstractNote = {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.},
doi = {10.1103/PhysRevLett.117.126802},
journal = {Physical Review Letters},
number = 12,
volume = 117,
place = {United States},
year = {2016},
month = {9}
}

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