arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1606.04261cond-mat.mes-hall
收藏

无序反铁磁体中的自旋轨道矩

Spin orbit torque in disordered antiferromagnets

Hamed Ben Mohamed Saidaoui, Aurelien Manchon

摘要:

我们使用线性响应理论和紧束缚模型上实现的非平衡格林函数技术研究了存在Rashba自旋轨道耦合的反铁磁材料中电流诱导的自旋轨道扭矩。我们发现,交错的自旋密度来自带间的贡献。无序的影响仅限于力矩大小的减小,并没有对力矩对自旋轨道强度的依赖性以及反铁磁局域磁矩与巡游电子自旋之间的交换相互作用带来任何反常行为。我们证明了自旋轨道矩是强大的反铁磁自旋阀自旋转移矩的情况下,对应用程序的障碍相比。

英文摘要:

We investigate the current-induced spin-orbit torque in antiferromangnetic materials in the presence of Rashba spin orbit coupling using both the linear response theory and the non-equilibrium Green's function technique implemented on a tight-binding model. We show that a staggered spin density arises from interband contributions. The effect of the disorder is restricted to the diminution of the torque magnitude and does not bring any anomalous behavior to the dependences of the torque on the spin orbit strength and the exchange interaction between the antiferromagnetic local moments and the itinerant electrons spins. We prove that the spin orbit torque is robust against the application of the disorder compared to the case of the antiferromagnetic spin-valve spin transfer torque.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑