Fig. 1: Scope and background.
From: Copper ion diffusion by solid solution treatment advancing GeTe-based thermoelectrics
a Schematic diagram of the reversible phase transformation between rhombohedral (R-) and cubic (C-) GeTe. b Point defect formation energy of a Ge vacancy in a Ge27Te27 supercell doped with various elements in both Ge-rich and Ge-poor conditions. c Comparison of the proposed temperature-dependent phase evolution between ref. 40. and this work, where O-, α-, and β- indicate orthorhombic, hexagonal, and cubic structure. d Comparison of ZT and average ZTavg between literature and this work.
