论文标题
电子在各向异性多频道系统中的扩散密度响应
Diffusive density response of electrons in anisotropic multiband systems
论文作者
论文摘要
我们通过在包括远距离疾病在内的杂质的情况下，通过保护各向异性多型系统的顶点校正来明确计算密度密度响应函数。正确考虑了顶点校正的方向依赖性，以获得扩散常数，该扩散常数是通过在费米表面上组合转运时间和速度的组合给出的。我们还研究了各种各向异性系统的扩散密度响应，为相应的扩散常数提出了一些经验规则，并证明，考虑到转运时间的组件依赖性至关重要，以正确解释各种拓扑系统，尤其是在每个方向上具有不同的拓扑材料的各种拓扑材料的传输性能。
We explicitly calculate the density-density response function with conserving vertex corrections for anisotropic multiband systems in the presence of impurities including long-range disorder. The direction-dependence of the vertex corrections is correctly considered to obtain the diffusion constant which is given by the combination of the componentwise transport relaxation times and velocities on the Fermi surface. We also investigate the diffusive density response of various anisotropic systems, propose some empirical rules for the corresponding diffusion constant, and demonstrate that it is crucial to consider the component-dependence of the transport relaxation times to correctly interpret the transport properties of anisotropic systems, especially various topological materials with a different power-law dispersion in each direction.
