论文标题
$ \ mathrm {mn_3si_ {2} te_6} $中的旋转频率交互和短距离顺序
Spin-phonon interaction and short range order in $\mathrm{Mn_3Si_{2}Te_6}$
论文作者
论文摘要
使用拉曼光谱和密度功能理论计算研究了Ferrimagnetic $ \ MATHRM {Mn_3SI_ {2} TE_6} $单晶的振动特性。确定了18种拉曼活性模式，其中14个是根据三角形对称性分配的。另外四个峰，遵守$ a_ {1g} $选择规则，归因于泛音。 $ a_ {1g}^5 $模式的非常规温度的演变表明，不同的短磁力相关性之间的竞争显着影响$ \ mathrm {mn_3si_ {2} te_6} $中的旋转频率相互作用。这项研究为晶格特性提供了全面的见解，研究了它们的温度依赖性，并显示了在$ \ mathrm {mn_3si_ {2} te_6} $中存在竞争短期磁相的论点。
The vibrational properties of ferrimagnetic $\mathrm{Mn_3Si_{2}Te_6}$ single crystals are investigated using Raman spectroscopy and density functional theory calculations. Eighteen Raman-active modes are identified, fourteen of which are assigned according to with the trigonal symmetry. Four additional peaks, obeying the $A_{1g}$ selection rules, are attributed to the overtones. The unconventional temperature evolution of the $A_{1g}^5$ mode self-energy suggests a competition between different short-range magnetic correlations that significantly impact the spin-phonon interaction in $\mathrm{Mn_3Si_{2}Te_6}$. The research provides a comprehensive insight to the lattice properties, studies their temperature dependence and shows the arguments for existence of competing short-range magnetic phases in $\mathrm{Mn_3Si_{2}Te_6}$.
