AI 中文总结
研究轨道交替磁体中d波轴向声子的角动量分裂效应，通过考虑含d波环流序的电子紧束缚模型，在玻恩-奥本海默近似下经分子贝里曲率纳入电子-声子耦合，扩展了轴向声子工程平台范围并指出d波纹理特有功能。
AI 中文摘要
我们从理论上证明，在没有自旋轨道耦合的情况下，携带有限角动量的轴向声子（晶格振动量子）可以在轨道交替磁体中呈现d波角动量纹理。我们考虑一个具有打破时间反演对称性的d波环流序的最小电子紧束缚模型。在玻恩-奥本海默近似下，通过分子贝里曲率纳入电子-声子耦合，表明电子态潜在的d波轨道磁矩纹理被转移到声子上，而无需相对论自旋轨道耦合。我们的结果扩展了可用于工程轴向声子的平台范围，并指出了d波纹理特有的功能，包括与由温度梯度驱动的纵向和横向角动量电流相对应的角动量塞贝克和分裂效应。
英文摘要
We theoretically demonstrate that axial phonons, lattice vibration quanta carrying finite angular momentum, can host a $d$-wave angular momentum texture in orbital altermagnets in the absence of spin-orbit coupling. We consider a minimal electronic tight-binding model with $d$-wave loop-current order that breaks time-reversal symmetry. Within the Born-Oppenheimer approximation, we incorporate electron-phonon coupling via the molecular Berry curvature and show that the underlying $d$-wave orbital magnetic moment texture of the electronic state is transferred to the phonons without requiring the relativistic spin-orbit coupling. Our results expand the range of platforms available for engineering axial phonons and point to functionality unique to $d$-wave textures, including angular-momentum Seebeck and splitter effects, corresponding to longitudinal and transverse angular-momentum currents driven by a temperature gradient.
Comments30 pages, 5 figures
