论文标题
laalo $ _3 $/srtio $ _3 $接口的自旋纹理驱动的自旋增强
Spin texture driven spintronic enhancement at the LaAlO$_3$/SrTiO$_3$ interface
论文作者
论文摘要
最近的实验表明，过渡金属氧化金属异质结构（例如SRTIO $ _3 $的界面）表现出较大的栅极可调，自旋响应。我们的理论研究展示了控制转换幅度的关键因素，该转换的大小是由逆Edelstein和自旋霍尔效应及其相对于静电掺杂的演变。响应的起源可以与旋转轨道纹理有关。这些词根源于界面处的反转对称性，如果存在大量的原子旋转轨道贡献，则产生了界面自旋轨道耦合的异常形式。这些可观察物的幅度和变化是这些材料的多轨子带结构的直接后果，这些材料具有避免和拓扑交叉的元素。对系数的带间贡献会导致增强的响应和掺杂的非单调演变。我们使用分析方法和低能建模强调了这些效果。
Recent experiments have shown that transition metal oxide heterostructures such as SrTiO$_3$-based interfaces, exhibit large, gate tunable, spintronic responses. Our theoretical study showcases key factors controlling the magnitude of the conversion, measured by the inverse Edelstein and Spin Hall effects, and their evolution with respect to an electrostatic doping. The origin of the response can be linked to spin-orbital textures. These stem from the broken inversion symmetry at the interface which produces an unusual form of the interfacial spin-orbit coupling, provided a bulk atomic spin-orbit contribution is present. The amplitudes and variations of these observables are direct consequences of the multi-orbital subband structure of these materials, featuring avoided and topological crossings. Interband contributions to the coefficients lead to enhanced responses and non-monotonic evolution with doping. We highlight these effects using analytical approaches and low energy modeling.
