论文标题
域壁偏斜散射在铁磁韦尔金属中
Domain wall skew scattering in ferromagnetic Weyl metals
论文作者
论文摘要
我们研究在铁磁性I型Weyl金属的晶格模型中存在磁性域壁（DWS）的运输。我们使用Kubo和Landauer的形式主义计算在DW存在下的对角线和霍尔电导率，并发现DW散射的效果。当费米水平靠近Weyl点时，我们发现DW处的偏斜散射很强，从而导致了显着的额外效果。我们估计多域配置的平均霍尔电阻率，并确定DW散射贡献显着的极限。我们表明，通过线性化Weyl点周围的晶格分散而获得的连续模型无法正确捕获此DW物理学。超越了线性化的理论，并结合了领先的曲率项，这与我们的晶格模型结果达成了半定量性一致性。我们的结果与自旋轨道耦合的铁磁体的大厅电阻率上的实验有关，该旋转耦合的铁磁体可以在费米能量附近具有Weyl点。
We study transport in the presence of magnetic domain walls (DWs) in a lattice model of ferromagnetic type-I Weyl metals. We compute the diagonal and Hall conductivities in the presence of a DW, using both Kubo and Landauer formalisms, and uncover the effect of DW scattering. When the Fermi level lies near Weyl points, we find a strong skew scattering at the DW which leads to a significant additional Hall effect. We estimate the average Hall resistivity for multi-domain configurations and identify the limit where the DW scattering contribution becomes significant. We show that a continuum model obtained by linearizing the lattice dispersion around the Weyl points does not correctly capture this DW physics. Going beyond the linearized theory, and incorporating leading curvature terms, leads to a semi-quantitative agreement with our lattice model results. Our results are relevant for experiments on the Hall resistivity of spin-orbit coupled ferromagnets, which can have Weyl points near the Fermi energy.
