论文标题
大量狄拉克电子的倒数法拉第效应
Inverse Faraday effect in massive Dirac electrons
论文作者
论文摘要
我们使用Keldysh形式主义和示意性扰动理论研究了具有随机杂质的Dirac Hamiltonian中的反向法拉第效应（IFE）。 Dirac Hamiltonian中的质量术语对于IFE至关重要，在该IFE中，通过圆形极化光引起的自旋磁矩与THZ状态内入射光的频率成正比。对于大量的狄拉克电子，由于旋转磁矩顶点上的短距离杂质而引起的校正表现出自旋磁矩顶点和自旋角动量顶点的混合。通过带边缘附近的顶点校正来增强自旋磁密度响应，从而指出了大型狄拉克电子中自旋密度曲线的长距离扩散。
We study the inverse Faraday effect (IFE) in a Dirac Hamiltonian with random impurities using Keldysh formalism and diagrammatic perturbation theory. The mass term in the Dirac Hamiltonian is essential for IFE, where the spin magnetic moment induced by circularly polarized light is proportional to the frequency of the incident light within the THz regime. For massive Dirac electrons, the corrections due to short-range impurities on spin magnetic moment vertex exhibits mixing of the spin magnetic moment vertex and spin angular momentum vertex. The spin magnetic density response is divergently enhanced by the vertex corrections near the band edge, indicting a long-range diffusion of spin density profile in massive Dirac electrons.
