论文标题
钙钛矿作为旋转电流发生器
Perovskite as a spin current generator
论文作者
论文摘要
从理论上讲，我们表明具有钙钛矿型晶体结构的材料为旋转当前的生成提供了一个平台，利用一种机制既不需要自旋轨道耦合也不需要铁磁矩，而是基于旋转分裂的带状结构，以某些类型的共线性抗fifRyFromagnetic态。通过研究通过Hartree-fock近似和Boltzmann传输理论的多型和Hubbard模型，用于过渡金属化合物，我们发现纯自旋电流是由应用于C型抗磁力磁性金属相诱导的。旋转当前一代源自由于GDFEO $ _3 $ -Type晶格畸变的空间各向异性电子传递积分的合作效应，该晶格扭曲在许多钙钛矿中无处不在，以及孔线性旋转构型。我们从对称的角度讨论了我们的发现，与其他旋转电流发生器的候选者相比，我们的发现。我们还提出了几种检测候选钙钛矿材料中现象的方法。
We theoretically show that materials with perovskite-type crystal structures provide a platform for spin current generation, taking advantage of a mechanism requiring neither the spin-orbit coupling nor a ferromagnetic moment, but is based on spin-split band structures in certain kinds of collinear antiferromagnetic states. By investigating a multiband Hubbard model for transition metal compounds by means of the Hartree-Fock approximation and the Boltzmann transport theory, we find that a pure spin current is induced by an electric field applied to a C-type antiferromagnetic metallic phase. The spin current generation originates from a cooperative effect of spatially anisotropic electron transfer integrals owing to the GdFeO$_3$-type lattice distortion, which is ubiquitous in many perovskites, and the collinear spin configuration. We discuss our finding from the symmetry point of view, in comparison with other spin current generator candidates with collinear antiferomagnetism. We also propose several ways to detect the phenomenon in candidate perovskite materials.
