论文标题
对内在异常和自旋大厅电导率的多体校正
Many-body correction to the intrinsic anomalous and spin Hall conductivities
论文作者
论文摘要
旋转轨道耦合系统中的瓦利亚不变性破裂可以扩大对其不同响应的多体效应。我们研究带有Rashba自旋轨耦合的磁性二维电子气体的异常大厅和自旋大厅的电导率。我们表明，在固有极限中，这两个电导率均根据纵向和横向自旋旋反应函数完全指定。我们将电子电子相互作用的效果包括在自旋旋转线性响应函数中，超出了随机相近似。我们通过将本地场校正纳入响应函数中来做到这一点，从而考虑了多体交换相关效应。我们观察到由于电子 - 电子相互作用而导致的静态异常电导率的显着增强。自旋大厅效应上的多体校正更为平底，强烈的电子电子相互作用甚至可以逆转静态自旋霍尔电导率的迹象。
Broken Galilean invariance in a spin-orbit coupled system can amplify many-body effects on its different responses. We study the anomalous Hall and spin Hall conductivities of a magnetic two-dimensional electron gas with Rashba spin-orbit coupling. We show that both of these conductivities in the intrinsic limit are fully specified in terms of the longitudinal and transverse spin-spin response functions. We include the effect of electron-electron interaction in the spin-spin linear response functions, going beyond the random-phase approximation. We do this by incorporating the local-field correction in the response functions, which takes into account the many-body exchange-correlation effects. We observe a significant enhancement of the static anomalous Hall conductivity due to the electron-electron interaction. The many-body correction on the spin Hall effects is more non-trivial, and strong electron-electron interaction can even reverse the sign of the static spin Hall conductivity.
