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Raman Tensor of Layered SnS2
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2020-11-13 , DOI: 10.1021/acs.jpclett.0c03024
Ying Ding 1 , Wei Zheng 1 , Xuefang Lu 1 , Yali Liang 1 , Yanming Zhu 1 , Mingge Jin 1 , Feng Huang 1
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2020-11-13 , DOI: 10.1021/acs.jpclett.0c03024
Ying Ding 1 , Wei Zheng 1 , Xuefang Lu 1 , Yali Liang 1 , Yanming Zhu 1 , Mingge Jin 1 , Feng Huang 1
Affiliation
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Recently, tin disulfide (SnS2) has become a hot research focus in various fields due to its advantages of a high transistor switching ratio, an adjustable band gap in visible light range, excellent Li storage performance, sensitive gas recognition, and efficient photocatalytic capability. However, at present, studies of its basic structure mostly stay on the regulation related to the number of layers. To maximize the value of SnS2 in the application design, this paper analyzes the angle-resolved polarized Raman spectra of SnS2 crystals grown under high-temperature sealing systems. Under the parallel scattering configuration test of both the sample basal plane and the cross plane, we observed that how the Raman scattering intensity of the two test planes varies with the polarization angle is different. Combining this experimental result with theory support allows us to reach a conclusion that the differential polarizability of the phonon vibration mode along the z-axis of the cross plane of SnS2 is proven to be the strongest. This finding is expected to provide favorable support for the application of structural regulation of SnS2 and work as a reference for studying other van der Waals layered materials with greater potential.
中文翻译:
SnS 2分层拉曼张量
近年来,二硫化锡(SnS 2)由于具有高晶体管开关比,可见光范围内的带隙可调,出色的锂存储性能,灵敏的气体识别能力和有效的光催化能力等优点,已成为各个领域的研究热点。 。但是,目前,对其基本结构的研究大多停留在与层数有关的调节上。为了使应用设计中的SnS 2值最大化,本文分析了SnS 2的角度分辨偏振拉曼光谱在高温密封系统下生长的晶体。在样品基面和横截面的平行散射构型测试下,我们观察到两个测试面的拉曼散射强度如何随偏振角变化而不同。将该实验结果与理论支持相结合,可以得出结论:声子振动模式沿SnS 2横截面的z轴的差分极化率被证明是最强的。该发现有望为SnS 2的结构调控应用提供有利的支持,并为研究其他具有更大潜力的范德华层状材料提供参考。
更新日期:2020-12-03
中文翻译:
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SnS 2分层拉曼张量
近年来,二硫化锡(SnS 2)由于具有高晶体管开关比,可见光范围内的带隙可调,出色的锂存储性能,灵敏的气体识别能力和有效的光催化能力等优点,已成为各个领域的研究热点。 。但是,目前,对其基本结构的研究大多停留在与层数有关的调节上。为了使应用设计中的SnS 2值最大化,本文分析了SnS 2的角度分辨偏振拉曼光谱在高温密封系统下生长的晶体。在样品基面和横截面的平行散射构型测试下,我们观察到两个测试面的拉曼散射强度如何随偏振角变化而不同。将该实验结果与理论支持相结合,可以得出结论:声子振动模式沿SnS 2横截面的z轴的差分极化率被证明是最强的。该发现有望为SnS 2的结构调控应用提供有利的支持,并为研究其他具有更大潜力的范德华层状材料提供参考。