标题： 反磁体中通过磁振子拖拽高效生成自旋流 显示英文标题

标题： Efficient Generation of Spin Currents in Altermagnets via Magnon Drag

摘要： 反铁磁材料，一个近期被识别出的磁性材料类别，具有自旋劈裂的费米面，从而导致所谓的自旋分裂效应，能够产生垂直于注入方向且极化沿着奈尔矢量的自旋电流。 在这项研究中，我们探讨了磁振子与反铁磁金属中的电子相互作用。 我们发现，尽管电子-磁振子相互作用不会扰动磁振子色散，但在材料中流动的电荷电流可以诱导出横向磁振子自旋电流，类似于电子自旋分裂效应。 这种自旋电流同时具有电子和磁振子特性，即具有化学势依赖性和强温度依赖性。 这一效应实现了通过磁振子高效生成自旋电流，而不依赖于材料的自旋轨道耦合。 显示英文摘要

摘要： Altermagnets, a recently identified class of magnetic materials, possess a spin-split Fermi surface that results in the so-called spin splitter effect, enabling the generation of a spin current transverse to the injection direction and whose polarization lies along the N\'eel vector. In this study, we investigate how magnons interact with electrons in an altermagnetic metal. We find that while the electron-magnon interaction does not perturb the magnon dispersion, a charge current flowing in the material can induce a transverse magnon spin current, analogous to the electronic spin splitter effect. This spin current possesses both electronic and magnonic characteristics, i.e., a chemical potential dependence and a strong temperature dependence. This effect realizes the efficient generation of spin currents via magnons without depending on the material's spin-orbit coupling.