Электронные транспортные и оптические свойства монокристалла Mo 0,5 W 0,5 Te 2

Translated title of the contribution: Electronic transport and optical properties of Mo 0.5 W 0.5 Te 2 single crystal

V. V. Marchenkov, A. N. Domozhirova, A. A. Makhnev, E. I. Shreder, S. V. Naumov, V. V. Chistyakov, J. C.A. Huang, M. Eisterer

Research output: Contribution to journalArticle

Abstract

A relatively pure and perfect Weil semimetal Mo 0.5 W 0.5 Te 2 single crystal was synthesized and its electrical resistivity, galvanomagnetic properties at temperatures from 4.2 to 80 K in magnetic fields up to 10 T and also optical properties at room temperature were studied. It is shown that the temperature dependence of the resistivity has a metallic type. At T = 4.2 K and in a field of 10 T, the magnetoresistivity reaches 29%, monotonously decreasing with temperature. Analysis of the field and temperature dependences of the magnetoresistivity suggests that the Fermi surface of the Mo 0.5 W 0.5 Te 2 can contain both open and closed sheets. Studies of the Hall effect and estimates made on this basis showed that the majority carriers are electrons with a concentration of ~ 10 20 cm –3 and mobility of ~ 151 cm 2 /V·s at T = 4.2 K. Concentration of current carriers increases with temperature, and mobility decreases. Optical studies showed that the Mo 0.5 W 0.5 Te 2 single crystal does not exhibit features characteristic of metals. Interband absorption of light dominates over the entire studied range of the spectrum. The appearance of a weak contribution from free carriers is noted at energies of less than 0.6 eV.

Translated title of the contribution Electronic transport and optical properties of Mo 0.5 W 0.5 Te 2 single crystal
Original languageRussian
Pages (from-to)278-282
Number of pages5
JournalFizika Nizkikh Temperatur
Volume45
Issue number2
Publication statusPublished - 2019 Feb

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Marchenkov, V. V., Domozhirova, A. N., Makhnev, A. A., Shreder, E. I., Naumov, S. V., Chistyakov, V. V., Huang, J. C. A., & Eisterer, M. (2019). Электронные транспортные и оптические свойства монокристалла Mo 0,5 W 0,5 Te 2 Fizika Nizkikh Temperatur, 45(2), 278-282.