This title appears in the Scientific Report :
2021
Please use the identifier:
http://hdl.handle.net/2128/27071 in citations.
Please use the identifier: http://dx.doi.org/10.1038/s41567-020-0998-2 in citations.
High-temperature quantum anomalous Hall regime in a MnBi2Te4/Bi2Te3 superlattice
High-temperature quantum anomalous Hall regime in a MnBi2Te4/Bi2Te3 superlattice
The quantum anomalous Hall effect1,2 is a fundamental transport response of a topological insulator in zero magnetic field. Its physical origin is a result of an intrinsically inverted electronic band structure and ferromagnetism3, and its most important manifestation is the dissipationless flow of...
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Personal Name(s): | Deng, Haiming |
---|---|
Chen, Zhiyi / Wołoś, Agnieszka / Konczykowski, Marcin / Sobczak, Kamil / Sitnicka, Joanna / Fedorchenko, Irina V. / Borysiuk, Jolanta / Heider, Tristan / Pluciński, Łukasz / Park, Kyungwha / Georgescu, Alexandru B. / Cano, Jennifer / Krusin-Elbaum, Lia (Corresponding author) | |
Contributing Institute: |
Elektronische Eigenschaften; PGI-6 |
Published in: | Nature physics, 17 (2021) 1, S. 36 - 42 |
Imprint: |
Basingstoke
Nature Publishing Group
2021
|
DOI: |
10.1038/s41567-020-0998-2 |
Document Type: |
Journal Article |
Research Program: |
Topological Matter |
Link: |
Published on 2020-08-17. Available in OpenAccess from 2021-02-17. Restricted |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1038/s41567-020-0998-2 in citations.
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520 | |a The quantum anomalous Hall effect1,2 is a fundamental transport response of a topological insulator in zero magnetic field. Its physical origin is a result of an intrinsically inverted electronic band structure and ferromagnetism3, and its most important manifestation is the dissipationless flow of chiral charge currents at the edges of the system4, a property that has the potential to transform future quantum electronics5,6. Here, we report a Berry-curvature-driven4,7 anomalous Hall regime at temperatures of several Kelvin in the magnetic topological bulk crystals in which Mn ions self-organize into a period-ordered MnBi2Te4/Bi2Te3 superlattice. Robust ferromagnetism of the MnBi2Te4 monolayers opens a surface gap8,9,10, and when the Fermi level is tuned to be within this gap, the anomalous Hall conductance reaches an e2/h quantization plateau, which is a clear indication of chiral transport through the edge states. The quantization in this regime is not obstructed by the bulk conduction channels and therefore should be present in a broad family of topological magnets. | ||
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