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Title: Structural and high-pressure properties of rheniite (ReS2) and (Re,Mo)S2
Author: Ibáñez i Insa, Jordi
Wózniak, Tomasz
Oliva, Robert
Popescu, Catalin
Hernández Márquez, Sergi
López Vidrier, Julià
Keywords: Molibdè
Teoria del funcional de densitat
Density functionals
Issue Date: 16-Feb-2021
Publisher: MDPI
Abstract: Rhenium disulfide (ReS2), known in nature as the mineral rheniite, is a very interesting compound owing to its remarkable fundamental properties and great potential to develop novel device applications. Here we perform density functional theory (DFT) calculations to investigate the structural properties and compression behavior of this compound and also of the (Re,Mo)S2 solid solution as a function of Re/Mo content. Our theoretical analysis is complemented with high-pressure X-ray diffraction (XRD) measurements, which have allowed us to reevaluate the phase transition pressure and equation of state of 1T-ReS2. We have observed the 1T-to-1T' phase transition at pressures as low as ~2 GPa, and we have obtained an experimental bulk modulus, B0, equal to 46(2) GPa. This value is in good agreement with PBE+D3 calculations, thus confirming the ability of this functional to model the compression behavior of layered transition metal dichalcogenides, provided that van der Waals corrections are taken into account. Our experimental data and analysis confirm the important role played by van der Waals effects in the high-pressure properties of 1T-ReS2.
Note: Reproducció del document publicat a:
It is part of: Minerals, 2021, vol. 11, num. 2
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ISSN: 2075-163X
Appears in Collections:Articles publicats en revistes (Física Aplicada)

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