Discovery of a magnetic conductive interface in PbZr0.2Ti0.8O3/SrTiO3 heterostructures

被引：24

作者：

Zhang, Yi ^{[1
]}

Xie, Lin ^{[2
,3
]}

Kim, Jeongwoo ^{[4
]}

Stern, Alex ^{[4
]}

Wang, Hui ^{[4
]}

Zhang, Kui ^{[1
]}

Yan, Xingxu ^{[1
]}

Li, Linze ^{[1
]}

Liu, Henry ^{[5
]}

Zhao, Gejian ^{[6
]}

Chi, Hang ^{[7
]}

Gadre, Chaitanya ^{[4
]}

Lin, Qiyin ^{[8
]}

Zhou, Yichun ^{[9
]}

Uher, Ctirad ^{[7
]}

Chen, Tingyong ^{[6
]}

Chu, Ying-Hao ^{[5
]}

Xia, Jing ^{[4
]}

Wu, Ruqian ^{[4
]}

Pan, Xiaoqing ^{[1
,4
]}

机构：

[1] Univ Calif Irvine, Dept Chem Engn & Mat Sci, Irvine, CA 92697 USA

[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[3] Nanjing Univ, Coll Engn & Appl Sci, Nanjing 210093, Jiangsu, Peoples R China

[4] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

[5] Natl Chiao Tung Univ, Dept Mat Sci & Engn, Hsinchu 30010, Taiwan

[6] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA

[7] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

[8] Univ Calif Irvine, Irvine Mat Res Inst, Irvine, CA 92697 USA

[9] Xiangtan Univ, Sch Mat Sci & Engn, Xiangtan 411105, Hunan, Peoples R China

来源：

NATURE COMMUNICATIONS | 2018年 / 9卷

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

AUGMENTED-WAVE METHOD; LAALO3/SRTIO3; INTERFACE; OXIDE HETEROSTRUCTURES; ROOM-TEMPERATURE; ELECTRON-GAS; SUPERCONDUCTIVITY; FERROMAGNETISM; POLARIZATION; FERROELECTRICITY; SUPERLATTICES;

D O I：

10.1038/s41467-018-02914-9

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Emergent physical properties often arise at interfaces of complex oxide heterostructures due to the interplay between various degrees of freedom, especially those with polar dis-continuities. It is desirable to explore if these structures may generate pure and controllable spin currents, which are needed to attain unmatched performance and energy efficiency in the next-generation spintronic devices. Here we report the emergence of a spin-polarized two-dimensional electron gas (SP-2DEG) at the interface of two insulators, SrTiO3 and PbZr0.2Ti0.8O3. This SP-2DEG is strongly localized at the interfacial Ti atoms, due to the interplay between Coulomb interaction and band bending, and can be tuned by the ferroelectric polarization. Our findings open a door for engineering ferroelectric/insulator interfaces to create tunable ferroic orders for magnetoelectric device applications and provide opportunities for designing multiferroic materials in heterostructures.

引用

页数：9

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