Abstract

Electronic spectra and bulk properties of Mo-rich bcc Mo-Re random alloys have been studied in the framework of density-functional theory. We show that the Fermi surface topology changes with rhenium concentration, i.e., so-called electronic topological transitions take place. We have found two electronic topological transitions, the formation of an electronic void at about 2 at. % of Re and a formation of a neck at about 6 at. % of Re. The influence of these transitions on the thermodynamic (lattice parameter, bulk modulus, and Gr\"uneisen constant) and kinetic (thermoelectric power) properties is analyzed.

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