界面自旋记忆损失的无序依赖性
Disorder Dependence of Interface Spin Memory Loss
摘要：
自旋-轨道耦合引起的界面自旋电流的不连续性可以用自旋记忆损耗（SML）参数δ来表征。我们使用第一性原理散射理论和最近发展的局域电流方案来研究Au的超晶格|铂、金|钯、磷|Pt和Co| Pt接口。我们发现一个最小的温度依赖性的界面，涉及铁磁体，我们归因于自旋无序的界面和一个强大的依赖性。对于Co，SML较大|Pt比Py|因为界面比较陡峭。晶格失配和界面合金化强烈地增强了SML，对于Au| Pt比Au| Pd接口。Pt的邻近感应磁化的影响可以忽略不计。
英文摘要：
The discontinuity of a spin-current through an interface caused by spin-orbit coupling is characterized by the spin memory loss (SML) parameter δ. We use first-principles scattering theory and a recently developed local current scheme to study the SML for Au|Pt, Au|Pd, Py|Pt and Co|Pt interfaces. We find a minimal temperature dependence for nonmagnetic interfaces and a strong dependence for interfaces involving ferromagnets that we attribute to the spin disorder. The SML is larger for Co|Pt than for Py|Pt because the interface is more abrupt. Lattice mismatch and interface alloying strongly enhance the SML that is larger for a Au|Pt than for a Au|Pd interface. The effect of the proximity induced magnetization of Pt is negligible.
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