论文标题
旋转泵入各向异性狄拉克电子
Spin Pumping into Anisotropic Dirac Electrons
论文作者
论文摘要
我们研究了通过微波辐射诱导的对相邻铁磁绝缘子理论上诱导的各向异性狄拉克电子系统。我们使用二阶扰动相对于界面交换偶联，我们通过使用二阶扰动流入狄拉克电子系统而制定了吉尔伯特阻尼增强。作为例证，我们考虑了bismuth中实现的各向异性狄拉克系统，以表明吉尔伯特阻尼会根据铁磁绝缘子的磁化方向而变化。我们的结果表明，此设置可以提供有关Dirac Electron系统各向异性的有用信息。
We study spin pumping into an anisotropic Dirac electron system induced by microwave irradiation to an adjacent ferromagnetic insulator theoretically. We formulate the Gilbert damping enhancement due to the spin current flowing into the Dirac electron system using second-order perturbation with respect to the interfacial exchange coupling. As an illustration, we consider the anisotropic Dirac system realized in bismuth to show that the Gilbert damping varies according to the magnetization direction in the ferromagnetic insulator. Our results indicate that this setup can provide helpful information on the anisotropy of the Dirac electron system.
