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Discerning the Vibrational Nature of ReS2 Raman Modes Using Solid-Angle-Resolved Raman Spectroscopy
ACS Photonics ( IF 6.5 ) Pub Date : 2022-10-17 , DOI: 10.1021/acsphotonics.2c00865
Ting Wen 1 , Jing Li 1 , Maodi Zhang 1 , Chenyin Jiao 1 , Shenghai Pei 1 , Zenghui Wang 1 , Juan Xia 1
Affiliation  

ReS2 exhibits reduced crystal symmetry, which leads to pronounced anisotropy and intricate Raman vibrations. However, to date, the vibrational nature of ReS2 Raman modes has remained elusive, with unresolved theoretical disputes. Here, we study Raman vibrations in ReS2 crystals using solid-angle-resolved Raman spectroscopy, which allows us to leverage the full 3 × 3 Raman tensor to resolve the Ag-like and Eg-like nature of all the 18 Raman modes. Combined with pressure-dependent measurements, we observe distinct behavior in the Ag-like and Eg-like modes. Our findings show unambiguous experimental evidence for discerning the ReS2 Raman modes and can offer important insights into the vibrational nature of Raman modes in layered anisotropic crystals.

中文翻译:

使用立体角分辨拉曼光谱法辨别 ReS2 拉曼模式的振动性质

ReS 2表现出降低的晶体对称性,这导致明显的各向异性和复杂的拉曼振动。然而,迄今为止,ReS 2拉曼模式的振动性质仍然难以捉摸,理论争议也未解决。在这里,我们使用立体角分辨拉曼光谱研究 ReS 2晶体中的拉曼振动,这使我们能够利用完整的 3 × 3 拉曼张量来解析所有 18 种拉曼模式的类 A g和类 E g性质. 结合压力相关测量,我们观察到 A g样和 E g样模式中的不同行为。我们的研究结果显示了辨别 ReS 2的明确实验证据拉曼模式可以提供对层状各向异性晶体中拉曼模式振动性质的重要见解。
更新日期:2022-10-17
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