论文标题
来自散射测量和理论的散装$ crcl_3 $中的声子和相位对称性
Phonons and phase symmetries in bulk $CrCl_3$ from scattering measurements and theory
论文作者
论文摘要
声子衍生的行为是过渡金属三哈利亚山脉中新现象的重要指标，包括旋转液体行为，二维磁性和自旋晶格耦合。但是，尚未充分探索声子及其对自旋结构和激发的依赖。在这项工作中，我们使用非弹性中子散射和密度功能理论探测和批判性地检查了整体$ CRCL_3 $的振动特性。我们证明了磁性和范德华相互作用对于描述$ CRCL_3 $中的结构和声子至关重要。但是，特定的自旋配置并不重要。这提供了理解由动态自旋晶格耦合控制的热传输测量值的背景。更重要的是，我们引入了一种有效的动态方法，该方法利用了大型常规单元细胞中的转化对称性，从而在量子相干扰条件方面产生了对声子分散，相互作用和测量光谱的见解。这项工作开辟了新的途径，以了解分层磁铁中的声子，更普遍地在各种材料的常规细胞几何形状中。
Phonon-derived behaviors are important indicators of novel phenomena in transition metal trihalides, including spin liquid behavior, two-dimensional magnetism, and spin-lattice coupling. However, phonons and their dependence on spin structure and excitations have not been adequately explored. In this work, we probe and critically examine the vibrational properties of bulk $CrCl_3$ using inelastic neutron scattering and density functional theory. We demonstrate that magnetic and van der Waals interactions are essential to describing the structure and phonons in $CrCl_3$; however, the specific spin configuration is unimportant. This provides context for understanding thermal transport measurements as governed by dynamical spin-lattice couplings. More importantly, we introduce an efficient dynamic method that exploits translational symmetries in large conventional unit cells that generates insights into phonon dispersions, interactions, and measured spectra in terms of quantum phase interference conditions. This work opens new avenues for understanding phonons in layered magnets and more generally in conventional cell geometries of a variety of materials.
