Electronic properties of semiconductors

Peculiarities of magnetic oscillations in HgSe monocrystal with Co impurities of low concentration ($<$ 1 at%)

A. I. Veinger^a, I. V. Kochman^a, V. I. Okulov^b, T. E. Govorkova<sup>b

a</sup> Ioffe Institute, St. Petersburg, Russia
^b Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, 620137 Yekaterinburg, Russia

Abstract: The results of experimental studies of magnetoresistance oscillations are described for a HgSe monocrystal with Co impurities of low concentration ($<$ 1 at%). It has been discovered that at such impurity concentrations ($\sim$10$^{18}$ cm$^{-3}$) there exists two types of magnetic oscillations: Shubnikov de Haas oscillations at low temperatures ($T<$ 10 K) and magnetophonon oscillations at higher temperatures ($T >$ 10 K). The first ones are caused by the interaction of electrons with magnetic fieled inside of a Landau sublevel and the latter – by the interaction with longitudinal optical phonons. The differences of these oscillations are characterized. A hypothesis of a nature of magnetophonon oscillations in such structures is proposed.

Keywords: 3$d$-impurities of low concentration, zero-gap semiconductors, magnetophonon oscillations, SdH oscillations, optical and acoustic phonons.

Received: 21.07.2021
Revised: 18.08.2021
Accepted: 10.09.2021

DOI: 10.21883/FTP.2022.01.51814.9718

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