Magnetic Interactions at the Nanoscale in Trilayer Titanates

被引：25

作者：

Cao, Yanwei ^{[1
]}

Yang, Zhenzhong ^{[2
,3
]}

Kareev, M. ^{[1
]}

Liu, Xiaoran ^{[1
]}

Meyers, D. ^{[1
]}

Middey, S. ^{[1
]}

Choudhury, D. ^{[1
,4
]}

Shafer, P. ^{[5
]}

Guo, Jiandong ^{[2
,3
,6
]}

Freeland, J. W. ^{[7
]}

Arenholz, E. ^{[5
]}

Gu, Lin ^{[2
,3
,6
]}

Chakhalian, J. ^{[1
]}

机构：

[1] Univ Arkansas, Dept Phys, Fayetteville, AR 72701 USA

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

[3] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[4] Indian Inst Technol, Dept Phys, Kharagpur 721302, W Bengal, India

[5] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

[6] Collaborat Innovat Ctr Quantum Matter, Beijing 100190, Peoples R China

[7] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 116卷 / 07期

基金：

中国国家自然科学基金;

关键词：

2-DIMENSIONAL ELECTRON GASES; ORBITAL PHYSICS; OXIDE; INTERFACE; SUPERCONDUCTIVITY; FERROMAGNETISM; COEXISTENCE;

D O I：

10.1103/PhysRevLett.116.076802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the phase diagram of competing magnetic interactions at the nanoscale in engineered ultrathin trilayer heterostructures of LaTiO3/SrTiO3/YTiO3, in which the interfacial inversion symmetry is explicitly broken. Combined atomic layer resolved scanning transmission electron microscopy with electron energy loss spectroscopy and electrical transport have confirmed the formation of a spatially separated two-dimensional electron liquid and high density two-dimensional localized magnetic moments at the LaTiO3/SrTiO3 and SrTiO3/YTiO3 interfaces, respectively. Resonant soft x-ray linear dichroism spectroscopy has demonstrated the presence of orbital polarization of the conductive LaTiO3/SrTiO3 and localized SrTiO3/YTiO3 electrons. Our results provide a route with prospects for exploring new magnetic interfaces, designing a tunable two-dimensional d-electron Kondo lattice, and potential spin Hall applications.

引用

页数：6

共 75 条

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