arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2101.07586cond-mat.mtrl-sci
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可调Rashba自旋轨道耦合及其与氧化物界面多轨道效应和磁有序的相互作用

Tunable Rashba spin-orbit coupling and its interplay with multiorbital effect and magnetic ordering at oxide interfaces

Weilong Kong, Tong Yang, Jun Zhou, Yong Zheng Luo, Jingsheng Chen, Lei Shen, Yong Jiang, Yuan Ping Feng, Ming Yang

摘要:

复杂氧化物异质结构如LaAlO 3/SrTiO 3(LAO/STO)界面是探索新兴的多自由度耦合和相关奇异现象的典范平台。在这项研究中,我们揭示了多轨道和磁有序的影响Rashba自旋轨道耦合(SOC)在LAO/STO(001)界面。基于第一性原理计算,我们发现,由于最低t_2g带的多轨道效应,界面绝缘体-金属跃迁可以对导带边缘附近的Rashba自旋分裂进行实质性的调谐.我们进一步揭示了Rashba SOC和内禀磁性之间的竞争,其中Rashba SOC诱导的自旋极化被界面磁性有序抑制。这些结果加深了我们对钙钛矿氧化物界面处复杂的电子和磁性重构的理解,并揭示了全氧化物基自旋电子器件的氧化物异质结构的工程。

英文摘要:

The complex oxide heterostructures such as LaAlO3/SrTiO3 (LAO/STO) interface are paradigmatic platforms to explore emerging multi-degrees of freedom coupling and the associated exotic phenomena. In this study, we reveal the effects of multiorbital and magnetic ordering on Rashba spin-orbit coupling (SOC) at the LAO/STO (001) interface. Based on first-principles calculations, we show that the Rashba spin splitting near the conduction band edge can be tuned substantially by the interfacial insulator-metal transition due to the multiorbital effect of the lowest t_2g bands. We further unravel a competition between Rashba SOC and intrinsic magnetism, in which the Rashba SOC induced spin polarization is suppressed by the interfacial magnetic ordering. These results deepen our understanding of intricate electronic and magnetic reconstruction at the perovskite oxide interfaces and shed light on the engineering of oxide heterostructures for all-oxides-based spintronic devices.

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。

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