Bismuth-content-dependent polarized Raman spectrum of InPBi alloy
Wei Guan-Nan1, Tan Qing-Hai1, Dai Xing1, Feng Qi1, Luo Wen-Gang1, Sheng Yu1, Wang Kai2, Pan Wen-Wu2, Zhang Li-Yao2, Wang Shu-Min2, Wang Kai-You1, †,
       

Raman spectra under Z(XX)Z̅ configurations for InP1−xBix samples, with 0 ≤ x ≤ 2.46%, in the range from 75 cm−1 to 700 cm−1. InBi-like optical vibration modes are observed in the low-frequency region (marked I). InP-like optical vibration modes are observed in the medium frequency region (marked II), while InP-like optical vibration overtones are observed in the high frequency region (marked III).