论文标题
Rashba-Dresselhaus的钙钛矿氧化物杂结辅助抗铁磁旋转
Perovskite oxide heterojunction for Rashba-Dresselhaus assisted antiferromagnetic spintronics
论文作者
论文摘要
基于反铁磁性旋转的新兴原理实现技术的主要障碍是不对合适的材料的短缺。在本文中，我们提出了钙钛矿氧化物的极性非极性异质结构的设计，其中将SRIRO3的单个单位细胞夹在Laalo3的薄膜和SRTIO3的底物之间。我们在密度功能理论 + Hubbard U +自旋轨道耦合的框架内的计算揭示了界面处的电子和孔口袋，表现出强烈的各向异性Rashba-dresselhaus效应，并表明了非collinear抗fifermagnetism，表明实现了旋转旋转的可能性。各向异性Rashba-Dresselhaus效果的有见地的物理模型很好地解释了我们的结果，提供了Rashba-Dresselhaus系数的估计，并说明了伪蛋白的方向。我们的结果表明，异质结构可能具有抗磁性旋转型的基本成分，应进行实验验证。
A major impediment towards realizing technologies based on the emerging principles of antiferromagnetic spintronics is the shortage of suitable materials. In this paper, we propose a design of polar|nonpolar heterostructures of perovskite oxides, where a single unit cell of SrIrO3 is sandwiched between a thin film of LaAlO3 and a substrate of SrTiO3. Our calculations within the framework of density-functional theory + Hubbard U + spin-orbit coupling reveal a two-dimensional conducting layer with electron and hole pockets at the interface, exhibiting a strong anisotropic Rashba-Dresselhaus effect along with noncollinear antiferromagnetism, indicating the possibility of realizing a spin-orbit torque. An insightful physical model for the anisotropic Rashba-Dresselhaus effect nicely interprets our results, providing an estimate for the Rashba-Dresselhaus coefficients and illustrating pseudospin orientation.We also observe a proximity-induced prominent Rashba-like effect for Ti 3d empty bands. Our results suggest that the heterostructure may possess the essential ingredients for antiferromagnetic spintronics, deserving experimental verification.
