Lattice dynamics properties of chalcopyrite ZnSnP2: Density-functional calculations by using a linear response theory
Yu You1, †, Dong Yu-Jing2, Shen Yan-Hong1, Zhao Guo-Dong1, Zheng Xiao-Lin1, Sheng Jia-Nan1
       

(color online) Symmetry coordinates for B modes ( ; displacements in the plane are represented by arrows and displacements in the z direction by open and closed circles.