2026-02-10 東京科学大学
研究の概要を表した模式図
＜関連情報＞
- https://www.isct.ac.jp/ja/news/l5emy5ibht8b
- https://www.isct.ac.jp/plugins/cms/component_download_file.php?type=2&pageId=&contentsId=1&contentsDataId=3215&prevId=&key=1d63b831c78d9af76bb5d820778d6a21.pdf
- https://journals.aps.org/prl/abstract/10.1103/wrpq-17h9
バルク絶縁性強磁性トポロジカル結晶絶縁体の実現とそのマルチキャリア表面ディラックコーン輸送 Realization of a Bulk-Insulating Ferromagnetic Topological Crystalline Insulator and Its Multicarrier Surface Dirac-Cone Transport
Yoshihiro Fukushima, Satoru Ichinkura, Taisuke Sasaki, and Toru Hirahara
Physical Review Letters Published: 9 February, 2026
DOI: https://doi.org/10.1103/wrpq-17h9
Abstract
We succeeded in fabricating an ideal, bulk-insulating ferromagnetic topological crystalline insulator by doping Mn to SnTe films grown on Bi2Te3. The cancellation of the polarity of SnTe surface and electron doping due to Bi and Mn leads to an ideal case where only the electron and holes of topological surface Dirac carriers exist at the Fermi level in different region of the surface Brillouin zone and their competition results in a nonlinear Hall effect. Ferromagnetism has been confirmed at 3.5 K through the detection of the anomalous Hall effect. These properties can potentially serve to realize and manipulate the high-Chern number quantum anomalous Hall effect.
