Interplay between Magnetism and Topology in MnBi2Te4
- 作者: Val'kov V.V.1, Zlotnikov A.O.1, Gamov A.1
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隶属关系:
- Kirensky Institute of Physics, Federal Research Center KSC, Siberian Branch, Russian Academy of Sciences
- 期: 卷 118, 编号 5-6 (9) (2023)
- 页面: 330-337
- 栏目: Articles
- URL: https://archivog.com/0370-274X/article/view/663063
- DOI: https://doi.org/10.31857/S1234567823170044
- EDN: https://elibrary.ru/JZNNVQ
- ID: 663063
如何引用文章
详细
The dependence of the topology of the fermion excitation spectrum on the magnetic state of the system is analyzed taking into account the structure of the Te–Mn–Te trilayer in the Te–Bi–Te–Mn–Te–Bi–Te layer sequence of the MnBi2Te4 van der Waals single crystal, crystal field effects, spin–orbit coupling, and the covalent mixing of electronic states of Mn2+ ions with electronic states of Te2– ions in the strong electron correlation regime. The Chern number in the ferromagnetic phase, which is due to the kinematic interaction between Hubbard fermions, is equal to 1; i.e., the topology of the band structure of the Te–Mn–Te trilayer is nontrivial. The Chern number in the paramagnetic phase is zero; i.e., the topology is trivial. The magnetic moments of Mn2+ ions for the constructed spin orbitals are perpendicular to the layers. The magnetic moments of Mn2+ ions in the nearest layers are antiferromagnetically ordered via the Anderson mechanism.
作者简介
V. Val'kov
Kirensky Institute of Physics, Federal Research Center KSC, Siberian Branch, Russian Academy of Sciences
Email: vvv@iph.krasn.ru
660036, Krasnoyarsk, Russia
A. Zlotnikov
Kirensky Institute of Physics, Federal Research Center KSC, Siberian Branch, Russian Academy of Sciences
Email: vvv@iph.krasn.ru
660036, Krasnoyarsk, Russia
A. Gamov
Kirensky Institute of Physics, Federal Research Center KSC, Siberian Branch, Russian Academy of Sciences
编辑信件的主要联系方式.
Email: vvv@iph.krasn.ru
660036, Krasnoyarsk, Russia
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