![]() ![]() ![]() The present paper provides basic information about the lattice dynamics in transition-metal dichalcogenides and may shed some light on the understanding of the extremely large magnetoresistance in this class of materials.Jun-Shi Chen, Zheng-Ming Chen, Rory Collins, Li-Ming Li, Richard Peto, Daniel Avery, Derrick Bennett, Yu-Mei Chang, Yi-Ping Chen, Zheng-Ming Chen, Robert Clarke, Huai-Dong Du, Xue-Juan Fan, Hai-Yan Gao, Simon Gilbert, Michael Holmes, Andri Iona, Rene Kerosi, Ling Kong, Om Kurmi, Garry Lancaster, Sarah Lewington, John McDonnell, Winnie Mei, Iona Millwood, Qun-Hua Nie, Jayakrishnan Radhakrishnan, Paul Ryder, Sam Sansome, Dan Schmidt, Paul Sherliker, Rajani Sohoni, Robin Walters, Jenny Wang, Lin Wang, Alex Williams, Ling Yang, Xiao-Ming Yang, Zheng Bian, Ge Chen, Lei Guo, Yu Guo, Bing-Yang Han, Can Hou, Peng Liu, Jun Lv, Pei Pei, Shu-Zhen Qu, Yun-Long Tan, Can-Qing Yu, Hui-Yan Zhou, Zeng-Chang Pang, Shao-Jie Wang, Yong-Mei Liu, Ran-Ran Du, Yai-Jing Zang, Liang Cheng, Xiao-Cao Tian, Hua Zhang, Si-Lu Liu, Jun-Zheng Wang, Wei Hou, Ji-Yuan Yin, Ge Jiang, Shu-Mei Liu, Zhi-Gang Pang, Xue Zhou, Li-Qiu Yang, Hui-Li Han, Hui He, Bo Yu, Yan-Jie Li, Jin Qi, Huai-Yi Mu, Qi-Nai Xu, Mei-Ling Dou, Jiao-Jiao Ren, Jian Wei Du, Shan-Qing Wang, Xi-Min Hu, Hong-Mei Wang, Jin-Yan Chen, Yan Fu, Zheng-Wang Fu, Xiao-Huan Wang, Hua Dong, Min Weng, Xiang-Yang Zheng, Yi-Jun Li, Hui-Mei Li, Cheng-Long Li, Ming Wu, Jin-Yi Zhou, Ran Tao, Jie Yang, Jie Shen, Yi-He Hu, Yan Lu, Yan Gao, Liang-Cai Ma, Ren- Xian Zhou, Ai-Yu Tang, Shuo Zhang, Jian-Rong Jin, Zhen-Zhu Tang, Na-Ying Chen, Ying Huang, Ming-Qiang Li, Jin-Huai Meng, Rong Pan, Qi-Lian Jiang, Jing-Xin Qing, Wei-Yuan Zhang, Yun Liu, Liu-Ping Wei, Li-Yuan Zhou, Ning-Yu Chen, Jun Yang, Hai-Rong Guan, Xian-Ping Wu, Ning-Mei Zhang, Xiao-Fang Chen, Xue-Feng Tang, Guo-Jin Luo, Jian-Guo Li, Xiao-Fang Chen, Jian Wang, Jia-Qiu Liu, Qiang Sun, Peng-Fei Ge, Xiao-Lan Ren, Cai-Xia Dong, Hui Zhang, En-Ke Mao, Xiao-Ping Wang, Tao Wang, Guo-Hua Liu, Bao-Yu Zhu, Gang Zhou, Shi-Xian Feng, Liang Chang, Lei Fan, Yu-Lian Gao, Tian-You He, Li Jiang, Jian-Hua Qin, Hua-Rong Sun, Pan He, Chen Hu, Qian-Nan Lv, Xu-Kui Zhang, Min Yu, Ru-Ying Hu, Le Fang, Hao Wang, Yi-Jian Qian, Zhi-Ying Wu, Chun-Mei Wang, Kai-Xue Xie, Ling-Li Chen, Ya-Xing Pan, Dong-Xia Pan, Yue-Long Huang, Bi-Yun Chen, Dong-Hui Jin, Hui-Lin Liu, Zhong-Xi Fu, Qiao-Hua Xu, Xin Xu, You-Ping Xiong, Wie-Fang Jia, Xian-Zhi Li, Li-Bo Zhang, Zhe Qiu ![]() Fifteen Raman-active phonon modes ( 10 A g + 5 B g ) in the high-symmetry phase 1 T ′ − MoT e 2 (300 K) were well assigned, and all the symmetry-allowed Raman modes ( 11 A 1 + 6 A 2 ) in the low-symmetry phase T d − MoT e 2 (10 K) and 12 Raman phonons ( 8 A 1 + 4 A 2 ) in T d − WT e 2 were observed and identified. Combining these results with first-principles calculations, we clearly identified the observed phonon modes in the different phases of both crystals. By rotating crystals to tune the angle between the principal axis of the crystals and the polarization of the incident/scattered light, we obtained the angle dependence of the intensities for all the observed modes, which is perfectly consistent with careful symmetry analysis. We comparably performed polarized Raman scattering studies of MoT e 2 and WT e 2.
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