Electronic properties of WTe2 and MoTe2 single crystals

A. N. Domozhirova, A. A. Makhnev, E. I. Shreder, S. V. Naumov, A. V. Lukoyanov, V. V. Chistyakov, J. C.A. Huang, A. A. Semiannikova, P. S. Korenistov, V. V. Marchenkov

Research output: Contribution to journalConference article

Abstract

WTe2 and MoTe2 single crystals were grown, and their electrical resistivity in the temperature range from 80 K to 300 K, optical properties at room temperature in the spectral range of 0.17-5.0 eV were studied as well as theoretical calculations of the electronic structure were performed. It is shown that the temperature dependence of the electrical resistivity of orthorhombic WTe2 has a metallic type with resistivity value of (0.5-1) mOhmcm, while hexagonal MoTe2 has a semiconductor one and resistivity value (0.5-1) Ohmcm, which is three orders of magnitude larger than the resistivity of WTe2. Optical properties indicated that there is no contribution from free carriers in the entire spectral range studied. The calculated densities of the electronic states of MoTe2 and WTe2 showed the presence of a bunch of the molybdenum and tungsten electronic states in a wide energy interval with strong admixing of tellurium states. In the WTe2 compound, the larger number of the electronic states is located near the Fermi energy, characterizing a more metallic state in this compound as compared to MoTe2.

Original languageEnglish
Article number012149
JournalJournal of Physics: Conference Series
Volume1389
Issue number1
DOIs
Publication statusPublished - 2019 Nov 28
Event7th Euro-Asian Symposium on Trends in Magnetism, EASTMAG 2019 - Ekaterinburg, Russian Federation
Duration: 2019 Sep 82019 Sep 13

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Domozhirova, A. N., Makhnev, A. A., Shreder, E. I., Naumov, S. V., Lukoyanov, A. V., Chistyakov, V. V., Huang, J. C. A., Semiannikova, A. A., Korenistov, P. S., & Marchenkov, V. V. (2019). Electronic properties of WTe2 and MoTe2 single crystals. Journal of Physics: Conference Series, 1389(1), [012149]. https://doi.org/10.1088/1742-6596/1389/1/012149