We combine diamond anvil cell techniques, synchrotron-based infrared and Raman scattering spectroscopies, a symmetry analysis, and complementary lattice dynamics calculations to explore the pressure-driven phase transition in multiferroic $h\text{−}{\mathrm{Lu}}_{0.6}{\mathrm{Sc}}_{0.4}{\mathrm{FeO}}_3$. Comparison of the measured and predicted phonon patterns reveals a $P{6}_{3}cm\to P\overline{3}c1$ structural transition at 15 GPa. Symmetry breaking across the polar $\to$ antipolar transition takes place via changes in the bipyramidal tilting direction and Lu/Sc displacement pattern, analogous to the strain-driven $K_3$ distortion pathway in $h\text{−}{\mathrm{LuFeO}}_3$ and temperature-induced transitions in the rare-earth manganites.

中文翻译：

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压力诱导相变和声子软化 inh−Lu0.6Sc0.4FeO3

我们结合金刚石砧座电池技术、基于同步加速器的红外和拉曼散射光谱、对称性分析和互补晶格动力学计算来探索多铁性中压力驱动的相变 $H\text{-}{鲁}_{0.6}{\mathrm{科学}}_{0.4}{\mathrm{氧化铁}}_3$. 测量和预测的声子模式的比较揭示了$磷6_{3}C米\to 磷\overline{3}C1$15 GPa 时的结构转变。对称性突破极地$\to$ 反极性转变通过双锥倾斜方向和 Lu/Sc 位移模式的变化发生，类似于应变驱动 ${钾}_3$ 失真路径 $H\text{-}{\mathrm{LuFeO}}_3$ 和温度诱导的稀土锰酸盐转变。