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Temperature dependence of Raman scattering in single crystal SnSe

文献类型：期刊论文

作者Gong, Xiangnan4; Wu, Hong1; Yang, Dingfeng3; Zhang, Bin4; Peng, Kunling1; Zou, Hanjun4; Guo, Lijie1; Lu, Xu1; Chai, Yisheng1; Wang, Guoyu2
刊名VIBRATIONAL SPECTROSCOPY
出版日期2020-03-01
卷号107页码:6
ISSN号0924-2031
关键词SnSe single crystal Temperature-dependent raman Laser-power-dependent raman Anharmonic effect
DOI10.1016/j.vibspec.2020.103034
通讯作者Chai, Yisheng(yschai@cqu.edu.cn) ; Wang, Guoyu(guoyuw@cigit.ac.cn) ; Zhou, Xiaoyuan(xiaoyuan2013@cqu.edu.cn)
英文摘要We report on the temperature-dependence Raman modes of in-plane B-g(3), A(g)(2) and out-of-plane A(g)(1), A(g)(3) in single crystals of tin selenide that grown by a modified home-made Bridgeman method. The samples are characterized by single crystal X-ray diffraction and high-resolution transmission electron microscopy to confirm their crystal structure. The temperature-dependence of Raman spectroscopy illustrates that A(g)(1), B-3(g), A(g)(2) and A(g)(3) modes are red-shifted and softened with increasing temperature from 77 K to 400 K. Large temperature coefficients for in-plane Raman modes are observed, say -4.13 x 10(-2) cm(-1)/K and -5.20 x 10(-2) cm(-1)/K for B-3g and A(g)(2) modes, respectively. The values for out-of-plane modes are much lower, say -0.91 x 10(-2) cm(-1)/K and -1.38 x 10(-2) cm(-1)/K for A(g)(1) and A(g)(3) modes, respectively. The result indicates intrinsic anisotropic Gruneisen parameter beta in SnSe, revealing the strong anisotropic lattice anharmonicity. Besides, coefficients of optical-phonon frequency with incident laser-power were (-0.87, -2.77, -2.18 and -1.08) cm(-1)/mW for A(g)(1), B-3g, A(g)(2) and A(g)(3) respectively for the laser-power dependent Raman spectroscopy experiments. Our work offers a new insight to understand the lattice anharmonicity via Raman spectroscopy and is conductive to search the new thermoelectric materials with intrinsic low lattice thermal conductivity.
资助项目National Natural Science Foundation of China[51772035] ; National Natural Science Foundation of China[11604032] ; National Natural Science Foundation of China[11674040] ; National Natural Science Foundation of China[51472036] ; National Natural Science Foundation of China[11874356] ; National Natural Science Foundation of China[51672270] ; Fundamental Research Funds for the Central Universities[2018CDQYWL0048] ; Fundamental Research Funds for the Central Universities[2018CDPTCG0001/26] ; Fundamental Research Funds for the Central Universities[106112017CDJQJ308821] ; Fundamental Research Funds for the Central Universities[2018CDJDWL0011] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSWSLH016] ; Project for Fundamental and Frontier Research in Chongqing[CSTC2015JCYJBX0026] ; Project for Fundamental and Frontier Research in Chongqing[CSTC2017JCYJAX0388]
WOS研究方向Chemistry ; Spectroscopy
语种英语
出版者ELSEVIER
WOS记录号WOS:000519527600017
源URL[http://119.78.100.138/handle/2HOD01W0/10642]  
专题中国科学院重庆绿色智能技术研究院
通讯作者Chai, Yisheng; Wang, Guoyu; Zhou, Xiaoyuan
作者单位1.Chongqing Univ, Coll Phys, Chongqing 401331, Peoples R China
2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
3.Chongqing Univ Technol, Coll Chem & Chem Engn, Chongqing 400054, Peoples R China
4.Chongqing Univ, Analyt & Testing Ctr, Chongqing 401331, Peoples R China
推荐引用方式
GB/T 7714		 Gong, Xiangnan,Wu, Hong,Yang, Dingfeng,et al. Temperature dependence of Raman scattering in single crystal SnSe[J]. VIBRATIONAL SPECTROSCOPY,2020,107:6.
APA Gong, Xiangnan.,Wu, Hong.,Yang, Dingfeng.,Zhang, Bin.,Peng, Kunling.,...&Zhou, Xiaoyuan.(2020).Temperature dependence of Raman scattering in single crystal SnSe.VIBRATIONAL SPECTROSCOPY,107,6.
MLA Gong, Xiangnan,et al."Temperature dependence of Raman scattering in single crystal SnSe".VIBRATIONAL SPECTROSCOPY 107(2020):6.

入库方式： OAI收割

来源：重庆绿色智能技术研究院

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