Vacancies and spin–phonon coupling in CrSi0.8Ge0.1Te3,Journal of Raman Spectroscopy

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Vacancies and spin–phonon coupling in CrSi0.8Ge0.1Te3
Journal of Raman Spectroscopy ( IF 2.4 ) Pub Date : 2020-08-14 , DOI: 10.1002/jrs.5962
Ana Milosavljević ₁ , Andrijana Šolajić ₁ , Bojana Višić ₁ , Marko Opačić ₁ , Jelena Pešić ₁ , Yu Liu ₂ , Cedomir Petrovic ₂ , Zoran V. Popović _{1,

3} , Nenad Lazarević ₁

Affiliation

We report temperature‐dependent Raman scattering and magnetization studies of van der Waals ferromagnetic compound CrSi_0.8Ge_0.1Te₃. Magnetic susceptibility measurements revealed dominant ferromagnetic interactions below T_C which shift to the lower values due to the presence of vacancies. A Raman active mode, additional to the ones predicted by symmetry in the parent compounds, has been observed. This A_g symmetry mode most likely emerges as a consequence of the atomic vacancies on Si/Ge site. Presence of the strong spin–phonon coupling at temperature around 210 K is indicated by deviations from conventional phonon self‐energy temperature dependence of all analysed modes.

中文翻译：

CrSi0.8Ge0.1Te3中的空位和自旋声子耦合

我们报告了范德华铁磁化合物CrSi _0.8 Ge _0.1 Te _3的温度依赖性拉曼散射和磁化强度研究。磁化率测量显示，低于T _C的主要铁磁相互作用由于空位的存在而移至较低值。除母体化合物中对称性所预测的模式外，还观察到拉曼活性模式。由于Si / Ge位点上的原子空位，这种G _g对称模式最有可能出现。所有分析模式与常规声子自能温度相关性的偏差表明，在210 K左右的温度下存在强自旋声子耦合。

更新日期：2020-08-14

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