论文标题
由振动 - 轨道耦合引起的声子手性
Phonon Chirality Induced by Vibronic-Orbital Coupling
论文作者
论文摘要
在过去的十年中，声子可以携带伪角动量的概念已经流行，最近的研究工作突出了声子性手性，声子谱带结构的浆果曲率和呼声厅效应。当声子与晶体电场激发偶联时，所谓的振动式结合态形成。在这里，我们观察到$δ$ jz = $ \ pm $ \ $ 1 $ \ hbar $之间的角动量传递，在候选量子旋转液体的振动结合状态下，声子和轨道状态之间的角度转移。该观察结果对通过手性准粒子相互作用的语音带结构拓扑的工程具有深远的影响。
The notion that phonons can carry pseudo-angular momentum has become popular in the last decade, with recent research efforts highlighting phonon chirality, Berry curvature of phonon band structure, and the phonon Hall effect. When a phonon is resonantly coupled to a crystal electric field excitation, a so-called vibronic bound state forms. Here, we observe angular momentum transfer of $δ$Jz = $\pm$1$\hbar$ between phonons and an orbital state in a vibronic bound state of a candidate quantum spin liquid. This observation has profound implications for the engineering of phonon band structure topology through chiral quasiparticle interactions.
