DOI: 10.1038/ncomms9474. Metal-to-insulator switching in quantum anomalous Hall states

Metal-to-insulator switching in quantum anomalous Hall states

10.1038/ncomms9474

Crossref journal-article

Springer Science and Business Media LLC

Nature Communications (297)

Abstract

AbstractAfter decades of searching for the dissipationless transport in the absence of any external magnetic field, quantum anomalous Hall effect (QAHE) was recently achieved in magnetic topological insulator films. However, the universal phase diagram of QAHE and its relation with quantum Hall effect (QHE) remain to be investigated. Here, we report the experimental observation of the giant longitudinal resistance peak and zero Hall conductance plateau at the coercive field in the six quintuple-layer (Cr0.12Bi0.26Sb0.62)2Te3 film, and demonstrate the metal-to-insulator switching between two opposite QAHE plateau states up to 0.3 K. Moreover, the universal QAHE phase diagram is confirmed through the angle-dependent measurements. Our results address that the quantum phase transitions in both QAHE and QHE regimes are in the same universality class, yet the microscopic details are different. In addition, the realization of the QAHE insulating state unveils new ways to explore quantum phase-related physics and applications.

Bibliography

Kou, X., Pan, L., Wang, J., Fan, Y., Choi, E. S., Lee, W.-L., Nie, T., Murata, K., Shao, Q., Zhang, S.-C., & Wang, K. L. (2015). Metal-to-insulator switching in quantum anomalous Hall states. Nature Communications, 6(1).

Authors 11

Xufeng Kou (first)
Lei Pan (additional)
Jing Wang (additional)
Yabin Fan (additional)
Eun Sang Choi (additional)
Wei-Li Lee (additional)
Tianxiao Nie (additional)
Koichi Murata (additional)
Qiming Shao (additional)
Shou-Cheng Zhang (additional)
Kang L. Wang (additional)

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Dates

Type	When
Created	9 years, 10 months ago (Oct. 7, 2015, 6:14 a.m.)
Deposited	2 years, 7 months ago (Jan. 5, 2023, 5:46 a.m.)
Indexed	2 weeks, 1 day ago (Aug. 6, 2025, 8:01 a.m.)
Issued	9 years, 10 months ago (Oct. 7, 2015)
Published	9 years, 10 months ago (Oct. 7, 2015)
Published Online	9 years, 10 months ago (Oct. 7, 2015)

Funders 0

None

BibTeX

@article{Kou_2015, title={Metal-to-insulator switching in quantum anomalous Hall states}, volume={6}, ISSN={2041-1723}, url={http://dx.doi.org/10.1038/ncomms9474}, DOI={10.1038/ncomms9474}, number={1}, journal={Nature Communications}, publisher={Springer Science and Business Media LLC}, author={Kou, Xufeng and Pan, Lei and Wang, Jing and Fan, Yabin and Choi, Eun Sang and Lee, Wei-Li and Nie, Tianxiao and Murata, Koichi and Shao, Qiming and Zhang, Shou-Cheng and Wang, Kang L.}, year={2015}, month=oct }

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