Magnetotransport effects in polar versus non-polar SrTiO3 based heterostructures

被引：24

作者：

Flekser, E. ^{[1
]}

Ben Shalom, M. ^{[1
]}

Kim, M. ^{[2
]}

Bell, C. ^{[2
]}

Hikita, Y. ^{[2
]}

Hwang, H. Y. ^{[2
]}

Dagan, Y. ^{[1
]}

机构：

[1] Tel Aviv Univ, Raymond & Beverly Sackler Sch Phys & Astron, IL-69978 Tel Aviv, Israel

[2] SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, Menlo Pk, CA 94025 USA

来源：

PHYSICAL REVIEW B | 2012年 / 86卷 / 12期

基金：

以色列科学基金会;

关键词：

ELECTRON-GAS; INTERFACE; SUPERCONDUCTIVITY; FERROMAGNETISM; COEXISTENCE; FIELD;

D O I：

10.1103/PhysRevB.86.121104

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Anisotropic magnetoresistance and negative magnetoresistance for in-plane fields are compared for the LaAlO3/SrTiO3 interface and the symmetric Nb-doped SrTiO3 heterostructure. Both effects are exceptionally strong in LaAlO3/SrTiO3. We analyze their temperature, magnetic field, and gate voltage dependencies and find them to arise from a Rashba-type spin-orbit coupling with magnetic scatterers that have two contributions to their potential: spin exchange and Coulomb interaction. Atomic spin-orbit coupling is sufficient to explain the small effects observed in Nb-doped SrTiO3. These results clarify contradicting transport interpretations in SrTiO3 based heterostructures.

引用

页数：5

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