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The 27th AIRAPT International Conference on High Pressure Science and Technology
Abstract

Poster


16:30

Vanadium tetrasulfide under high pressure: thermoelectric and electrical properties

Authors:
Natalia Morozova (IMP UB RAS - M.N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences) ; Igor Korobeinikov (IMP UB RAS - M.N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences) ; Alexander Titov (IMP UB RAS - M.N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, URFU - Ural Federal University) ; Sergey Ovsyannikov (BGI - Bayerisches Geoinstitut, Universität Bayreuth, ISSC UB RAS - Institute for Solid State Chemistry of Ural Branch of Russian Academy of Sciences)

Abstract:

 Transition metal chalcogenides are actively synthesized and investigated because of their enormous technological potential. [1,2]. The transition metal dichalcogenides are well studied, the trichalcogenides are comparatevively less studied. Vanadium tetrasulfide (VS4) remained poorly studied due to difficulties of its synthesis. VS4 is a semiconductor with a band gap of ~ 0.8-1.35 eV [3-4], and hence, its physical priperies and high-pressure effects on them are of considerable interest.

  In the present work, we have synthesized single-crystals of vanadium tetrasulfide (VS4) and investigated its electronic transport properties under high pressure up to 10 GPa. We found that the absolute value of the thermopower and electrical resistivity dramatically diminished with pressure, thereby suggesting a gradual closure of its semiconductor band gap.

 This work was supported by Minobrnauki of Russia (theme “Electron” No. АААА-А18-118020190098-5).

References

  1. K.F. Mak, J. Shan, Nat. Photon. 2016, 10, 216.
  2. Y. Jin, X. Li, J. Yang, Phys. Chem. Chem. Phys. 2015, 17, 18665.
  3. E. Flores, E. Muñoz-Cortés, J. Bodega, O. Caballero-Calero, M. Martín-González, C. Sánchez, J.R. Ares, and I. J. Ferrer, ACS Appl. Energy Mater. 2018, 1, 2333.
  4. M.N. Kozlova, A. N. Enyashin, and V. E. Fedorov, Journal of Structural Chemistry, 2016, 57, 1505.