characteristics of the Halide double perovskites (HDPs) Rb 2 CuSbX 6 (X= Cl, Br, and I)
compounds were computed using the FP-LAPW method within the density functional theory
framework, under high pressure conditions. HDPs received a lot of attention due to their
potential application in optoelectronic and thermoelectric devices. The Perdew-Burke-
Ernzerhof (PBEsol-GGA) is used to investigate the structural properties of selected …