A Raman and far‐infrared investigation of phonons in the rhombohedral V 2 –VI 3 compounds Bi 2 Te 3 , Bi 2 Se 3 , Sb 2 Te 3 and Bi 2 (Te 1− x Se x ) 3 (0 < x < 1), (Bi 1− y Sb y ) 2 Te 3 (0 < y < 1)

Abstract The Raman‐active lattice vibrations of Bi 2 Se 3 , Bi 2 Te 3 , Sb 2 Te 3 , and their solid slutions, whose symmetries correspond to the R 3 m space group, are investigated by Raman scattering. Three of the four expected Raman modes, E g and A 1g , could be determined. The FIR optical proper... View More