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

被引：14

作者：

Kong, Weilong ^{[1
,2
]}

Yang, Tong ^{[2
]}

Zhou, Jun ^{[3
]}

Luo, Yong Zheng ^{[1
]}

Zhu, Tao ^{[2
]}

Chen, Jingsheng ^{[4
]}

Shen, Lei ^{[1
]}

Jiang, Yong ^{[5
]}

Feng, Yuan Ping ^{[2
,6
]}

Yang, Ming ^{[7
]}

机构：

[1] Natl Univ Singapore, Dept Mech Engn, Singapore 117575, Singapore

[2] Natl Univ Singapore, Dept Phys, Singapore 117551, Singapore

[3] ASTAR, Inst Mat Res & Engn, 2 Fusionopolis Way, Innovis 138634, Singapore

[4] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117575, Singapore

[5] Tiangong Univ, Sch Elect & Informat Engn, Tianjin 300387, Peoples R China

[6] Natl Univ Singapore, Ctr Adv Two Dimens Mat, Singapore 117546, Singapore

[7] Hong Kong Polytech Univ, Dept Appl Phys, Hung Hom, Kowloon, Hong Kong, Peoples R China

来源：

PHYSICAL REVIEW B | 2021年 / 104卷 / 15期

关键词：

INITIO MOLECULAR-DYNAMICS; LAALO3/SRTIO3; SUPERCONDUCTIVITY; SEMICONDUCTORS; FERROMAGNETISM; COEXISTENCE; CONVERSION; RESONANCE; PLANE;

D O I：

10.1103/PhysRevB.104.155152

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Complex oxide heterostructures such as the LaAlO3/SrTiO3 (LAO/STO) interface are paradigmatic platforms to explore emerging multidegree of freedom coupling and the associated exotic phenomena. In this paper, 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 varied multiorbital effect of the lowest Ti-3d t(2g) bands. We further unravel an interplay between Rashba SOC and intrinsic magnetism, in which the Rashba SOC-induced spin polarization is suppressed significantly by the presence of interfacial magnetic ordering. These results deepen our understanding of SOC-related intricate electronic and magnetic reconstruction at the perovskite oxide interfaces and shed light on engineering of oxide heterostructures for all-oxide-based spintronic devices.

引用

页数：8

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