Journal of Radio Electronics. eISSN 1684-1719. 2023. ¹11
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DOI: https://doi.org/10.30898/1684-1719.2023.11.16

electrical resistivity and optical conductivity

of the antiferromagnetic topological insulator

MnBi2Te4 SINGLE CRYSTAL

 

B.M. Fominykh 1,2, A.N. Perevalova 1, E.B. Marchenkova 1,
E.I. Schreder 1, S.V. Naumov 1, V.V. Marchenkov1,2

 

1 M.N. Mikheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences

620108, Ekaterinburg, Sofia Kovalevskaya st., 18

2 Ural Federal University Named after the First President of Russia B.N. Yeltsin

620002, Ekaterinburg, Mira st., 21

 

The paper was received November 18, 2023.

 

Abstract. The anisotropy of the electrical resistivity and optical properties of the antiferromagnetic topological insulator MnBi2Te4 single crystal has been studied. It is shown that the electrical resistivity of MnBi2Te4 measured perpendicular to the (00l) plane is an order of magnitude higher than the resistivity measured in this plane. The behavior of optical conductivity is qualitatively similar for the cases when light is directed at the surface (00l) and at a surface perpendicular to the plane (00l). It has been shown that the optical spectrum of MnBi2Te4 is formed predominantly by interband transitions of charge carriers.

Key words:  antiferromagnetic topological insulator MnBi2Te4, single crystal, anisotropy, electrical resistivity, optical conductivity.

Financing: The work was carried out within the framework of the state assignment of the Ministry of Education and Science of Russia (themes “Spin” No. 122021000036-3 and “Electron” No. 122021000039-4) with partial support from the scholarship of the President of the Russian Federation for young scientists and graduate students (A.N.P., SP-2705.2022 .1).

Corresponding authors: Fominykh Bogdan Mikhailovich (fominykh@imp.uran.ru), Marchenkov Vyacheslav Viktorovich (march@imp.uran.ru)

 

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For citation:

Fominykh B.M., Perevalova A.N., Marchenkova E.B., Schreder E.I., Naumov S.V., Marchenkov V.V. Electrical resistivity and optical conductivity of the antiferromagnetic topological insulator MnBi2Te4 single crystal. // Journal of radio electronics. – 2023. – No. 11. https://doi.org/10.30898/1684-1719.2023.11.16  (In Russian)