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  Probing the low-temperature limit of the quantum anomalous Hall effect

Pan, L., Liu, X., He, Q. L., Stern, A., Yin, G., Che, X., et al. (2020). Probing the low-temperature limit of the quantum anomalous Hall effect. Science Advances, 6: eaaz3595, pp. 1-9. doi:10.1126/sciadv.aaz3595.

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Pan, Lei1, Autor
Liu, Xiaoyang1, Autor
He, Qing Lin1, Autor
Stern, Alexander2, Autor           
Yin, Gen1, Autor
Che, Xiaoyu1, Autor
Shao, Qiming1, Autor
Zhang, Peng1, Autor
Deng, Peng1, Autor
Yang, Chao-Yao1, Autor
Casas, Brian1, Autor
Choi, Eun Sang1, Autor
Xia, Jing1, Autor
Kou, Xufeng1, Autor
Wang, Kang L.1, Autor
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              

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Schlagwörter: Film thickness, Semiconductor doping, Temperature, Anomalous hall effects, Doping profiles, High temperature, Low temperature limit, Magnetic ordering temperatures, Material systems, Temperature regimes, Weak ferromagnetism, Quantum Hall effect
 Zusammenfassung: Quantum anomalous Hall effect has been observed in magnetically doped topological insulators. However, full quantization, up until now, is limited within the sub-1 K temperature regime, although the material's magnetic ordering temperature can go beyond 100 K. Here, we study the temperature limiting factors of the effect in Cr-doped (BiSb)2Te3 systems using both transport and magneto-optical methods. By deliberate control of the thin-film thickness and doping profile, we revealed that the low occurring temperature of quantum anomalous Hall effect in current material system is a combined result of weak ferromagnetism and trivial band involvement. Our findings may provide important insights into the search for high-temperature quantum anomalous Hall insulator and other topologically related phenomena. © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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Sprache(n): eng - English
 Datum: 2020-06-172020-06-17
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1126/sciadv.aaz3595
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Titel: Science Advances
  Andere : Sci. Adv.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Washington : AAAS
Seiten: - Band / Heft: 6 Artikelnummer: eaaz3595 Start- / Endseite: 1 - 9 Identifikator: ISSN: 2375-2548
CoNE: https://pure.mpg.de/cone/journals/resource/2375-2548