A hybrid functional first-principles study on the band structure of non-strained Ge1−xSnx alloys
Wang Xiaohuai1, Chen Chengzhao1, Feng Shengqi1, Wei Xinyuan2, Li Yun1, †
       

(color online) Difference of electrostatic potential energy between Ge63Sn1 and Ge64 on (110) face. Coffee balls are Ge atom and blue balls are Sn atom.