标题： 声子增强的光学自旋电导率和自旋分裂效应在交替磁体中 显示英文标题

标题： Phonon-enhanced optical spin-conductivity and spin-splitter effect in altermagnets

摘要： 共线反铁磁体具有非相对论自旋分裂能带且无净磁化，称为交替磁体，由于其独特的能带结构，表现出有趣的输运特性。 我们在此计算了这种材料薄片在声子散射存在下的线性响应光学电导率。 使用用于交替磁体的紧束缚晶格模型和用于声子部分的霍尔斯坦模型，我们发现电子-声子散射可以在有限频率下显著增加自旋电导率。 尽管描述电子-声子相互作用的自能是自旋无关的，但这种情况仍然发生。 有趣的是，我们表明电子-声子散射也会在有限频率下增强自旋分裂效应。 这些结果表明，具有强电子-声子耦合的交替磁体在交流自旋极化输运方面是有利的。 显示英文摘要

摘要： Collinear antiferromagnets with nonrelativistic spin-split bands and no net magnetization, called altermagnets, show interesting transport properties due to their unique band structure. We here compute the linear response optical conductivity of thin films of such materials in the presence of phonon scatterings. Using a tight-binding lattice model for altermagnets and the Holstein model for the phonon sector, we find that the electron-phonon scatterings can strongly increase the spin conductivity at finite frequencies. This occurs despite the fact that the self-energy describing the electron-phonon interactions is spin-independent. Interestingly, we show that electron-phonon scattering also enhances the spin-splitter effect at finite frequencies. These results suggest that altermagnets with strong electron-phonon coupling are favorable with regard to AC spin-polarized transport.