Vol. 7, Issue 2, Part G (2021)

Abstract
Electronic band structure calculations on Cs₂BaCu₅Te₁₀ at the density functional theory (DFT) level show a complex electronic structure near the Fermi level. In this paper, we study the two-dimensional structure of the compounds A₂Bacu₅Te₁₀ (A= k, Rb, Cs) fits the description of a "Phonon glass electron crystal" (PGEC) which good thermoelectric material. Electrical conductivity thermo power and thermal conductivity measured on polycrystalline ingots are reported, and the results are discussed in the conteret of the calculated electronic structure and the PGEC model.