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Different angle-resolved polarization configurations of raman spectroscopy: A case on the basal and edge plane of two-dimensional materials

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Chinese Physics B 2017年第6期26卷 422-429页

作者：刘雪璐张昕林妙玲谭平恒 State Key Laboratory for Superlattices and Microstructures Institute of SemiconductorsChinese Academy of Sciences College of Materials Science and Opto-Electronic Technology University of Chinese Academy of Sciences

angle-resolved polarized raman（ARPR） spectroscopy can be utilized to assign the raman modes based on crystal symmetry and raman selection rules and also to characterize the crystallographic orientation of anisotropic ***, polarized raman measurements can be implemented by several different configurations and thus lead to different results. In this work, we systematically analyze three typical polarization configurations： 1） to change the polarization of the incident laser, 2） to rotate the sample, and 3） to set a half-wave plate in the common optical path of incident laser and scattered raman signal to simultaneously vary their polarization directions. We provide a general approach of polarization analysis on the raman intensity under the three polarization configurations and demonstrate that the latter two cases are equivalent to each other. Because the basal plane of highly ordered pyrolytic graphite（HOPG） exhibits isotropic feature and its edge plane is highly anisotropic, HOPG can be treated as a modelling system to study ARPR spectroscopy of twodimensional materials on their basal and edge planes. Therefore, we verify the ARPR behaviors of HOPG on its basal and edge planes at three different polarization configurations. The orientation direction of HOPG edge plane can be accurately determined by the angle-resolved polarization-dependent G mode intensity without rotating sample, which shows potential application for orientation determination of other anisotropic and vertically standing two-dimensional materials and other materials.

关键词： angle-resolved polarized raman spectroscopy anisotropy two-dimensional materials edge plane

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Identification of vibrational mode symmetry and phonon anharmonicity in SbCrSe_(3)single crystal using raman spectroscopy

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Science China Materials 2021年第11期64卷 2824-2834页

作者： Hong Wu Xiangnan Gong Yi Peng Long Zhang Bin Zhang Kunling Peng Jie Liu Guang Han Aifeng Wang Yisheng Chai Mingquan He Haoshuang Gu Emmanuel Guilmeau Guoyu Wang Xu Lu Xiaoyuan Zhou College of Physics and Institute of Advanced Interdisciplinary Studies Chongqing UniversityChongqing 401331China Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China Analytical and Testing Center of Chongqing University Chongqing 401331China Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Hubei Key Laboratory of Ferro&Piezoelectric Materials and DevicesFaculty of Physics&Electronic SciencesHubei UniversityWuhan 430062China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Laboratoire CRISMAT UMR-CNRSNormandie UniversityCaen 14050France

Developing an understanding of the physics underlying vibrational phonon modes,which are strongly related to thermal transport,has attracted significant research ***,we report the successful synthesis of bulk SbCrSe_(3)single crystal and its thermal transport property over the temperature range from 2 to 300 *** angle-resolved polarized raman spectroscopy(ARPRS)and group theory calculation,the vibrational symmetry of each observed raman mode in the cleaved(001)crystal plane of SbCrSe_(3)is identified for the first time,and then further verified through firstprinciples *** ARPRS results of some raman modes(e.g.,Ag2~64 cm-1 and Ag 7~185 cm-1)can be adopted to determine the crystalline *** importantly,the temperature dependence of the lattice thermal conductivity(κL)is revealed to be more accurately depicted by the three-phonon scattering processes throughout the measured temperature range,substantiated by in-situ raman spectroscopy analysis and the model-predictedκ*** results reveal the fundamental physics of thermal transport for SbCrSe_(3)from a completely new perspective and should thus ignite research interest in the thermal properties of other lowdimensional materials using the same strategy.

关键词： SbCrSe3 single crystal in-situ raman angle-resolved polarized raman spectroscopy lattice dynamics thermal transport

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拉曼光谱定义SbCrSe3单晶的振动模式对称性和声子非谐性（英文）

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Science China Materials 2021年

作者：吴宏公祥南彭义张龙张斌彭坤玲刘杰韩广王爱峰柴一晟何明全顾豪爽 EmmanuelGuilmeau 王国玉卢旭周小元 CollegeofPhysicsandInstituteofAdvancedInterdisciplinaryStudies ChongqingUniversity ChongqingInstituteofGreenandIntelligentTechnology ChineseAcademyofSciences AnalyticalandTestingCenterofChongqingUniversity HubeiCollaborativeInnovationCenterforAdvancedOrganicChemicalMaterials HubeiKeyLaboratoryofFerro&PiezoelectricMaterialsandDevicesFacultyofPhysics&ElectronicSciencesHubeiUniversity CollegeofMaterialsScienceandEngineering ChongqingUniversity LaboratoireCRISMAT UMR-CNRSNormandieUniversity

本文报道了SbCrSe3单晶的合成方法及其在2–300 K温度范围内的热输运性能.通过角分辨偏振拉曼光谱技术、群论和理论计算分析,我们首次定义了该晶体沿（00l）解理面的拉曼振动模式对称性,并可利用其某些模式确定晶体轴向.另外,通过原位... 详细信息

本文报道了SbCrSe3单晶的合成方法及其在2–300 K温度范围内的热输运性能.通过角分辨偏振拉曼光谱技术、群论和理论计算分析,我们首次定义了该晶体沿（00l）解理面的拉曼振动模式对称性,并可利用其某些模式确定晶体轴向.另外,通过原位变温拉曼光谱和理论计算相结合的方式,分析得出三声子散射过程即可准确地描述晶格热导率对温度的依赖关系.本文从一个全新的角度揭示了SbCrSe3的热输运性质,为研究其他低维材料热性能提供了有力借鉴.

关键词： SbCrSe3single crystal in-situ raman angle-resolved polarized raman spectroscopy lattice dynamics thermal transport

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