论文标题
隧道各向异性自旋电流效应
Tunneling anisotropic spin galvanic effect
论文作者
论文摘要
我们表明，纯自旋注入从磁电到由隧道屏障组成的反转对称性系统，金属区域会产生横向电荷电流。这种隧穿自旋电流转化率对疾病和非本地性是可靠的，即注射和检测接触不一致，并且每当内部旋转轨道场具有非平常的角度依赖性时，就会强烈各向异性。各向异性以线性响应显示，这与缺乏隧道元素的批量转换设置中发生的情况相反。这与氧化物界面处的自旋荷利转换尤其重要，在氧化物界面上，隧道屏障和接收的低维金属系统宿主宿主具有复杂角对称性的有效自旋轨道场。
We show that pure spin injection from a magnetic electrode into an inversion symmetry-broken system composed of a tunnel barrier and a metallic region generates a transverse charge current. Such a tunnelling spin galvanic conversion is robust to disorder and non-local, i.e. injection and detection contacts do not coincide, and is strongly anisotropic whenever the internal spin-orbit field has a non-trivial angular dependence. The anisotropy shows up in linear response, contrary to what happens in bulk conversion setups lacking tunnelling elements. This is particularly relevant for spin-charge conversion at oxide interfaces, where both the tunnel barrier and the receiving low-dimensional metallic system host effective spin-orbit fields with complex angular symmetries.
