Light-Induced Giant Rashba Spin-Orbit Coupling at Superconducting KTaO3(110) Heterointerfaces

被引：30

作者：

Gan, Yulin ^{[1
]}

Yang, Fazhi ^{[1
]}

Kong, Lingyuan ^{[1
,5
]}

Chen, Xuejiao ^{[2
]}

Xu, Hao ^{[1
]}

Zhao, Jin ^{[1
]}

Li, Gang ^{[1
]}

Zhao, Yuchen ^{[1
]}

Yan, Lei ^{[1
]}

Zhong, Zhicheng ^{[2
]}

Chen, Yunzhong ^{[1
]}

Ding, Hong ^{[1
,3
,4
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn NIMTE, Key Lab Magnet Mat & Devices, Zhejiang Prov Key Lab Magnet Mat & Applicat Techno, Ningbo 315201, Peoples R China

[3] Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, Sch Phys & Astron, Shanghai 200240, Peoples R China

[4] Univ Chinese Acad Sci, CAS Ctr Excellence Topol Quantum Computat, Beijing 100190, Peoples R China

[5] CALTECH, Inst Quantum Informat & Matter, T J Watson Lab Appl Phys, Pasadena, CA 91125 USA

来源：

ADVANCED MATERIALS | 2023年 / 35卷 / 25期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

oxide interfaces; Rashba spin-orbit coupling; superconductivity; light modulation; Lifshitz transition; 2-DIMENSIONAL ELECTRON-GAS; FIELD CONTROL; PRECESSION;

D O I：

10.1002/adma.202300582

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The 2D electron system (2DES) at the KTaO3 surface or heterointerface with 5d orbitals hosts extraordinary physical properties, including a stronger Rashba spin-orbit coupling (RSOC), higher superconducting transition temperature, and potential of topological superconductivity. Herein, a huge enhancement of RSOC under light illumination achieved at a superconducting amorphous-Hf0.5Zr0.5O2/KTaO3(110) heterointerfaces is reported. The superconducting transition is observed with T-c = 0.62 K and the temperature-dependent upper critical field reveals the interaction between spin-orbit scattering and superconductivity. A strong RSOC with B-so = 1.9 T is revealed by weak antilocalization in the normal state, which undergoes sevenfold enhancement under light illumination. Furthermore, RSOC strength develops a dome-shaped dependence of carrier density with the maximum of B-so = 12.6 T achieved near the Lifshitz transition point n(c) approximate to 4.1 x 10(13) cm(-2). The highly tunable giant RSOC at KTaO3(110)-based superconducting interfaces show great potential for spintronics.

引用

页数：8

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