Kondo scattering in δ-doped LaTiO3/SrTiO3 interfaces: Renormalization by spin-orbit interactions

被引：36

作者：

Das, Shubhankar ^{[1
]}

Rastogi, A. ^{[1
]}

Wu, Lijun ^{[2
]}

Zheng, Jin-Cheng ^{[3
,4
]}

Hossain, Z. ^{[1
]}

Zhu, Yimei ^{[2
]}

Budhani, R. C. ^{[1
,5
]}

机构：

[1] Indian Inst Technol, Dept Phys, Condensed Matter Low Dimens Syst Lab, Kanpur 208016, Uttar Pradesh, India

[2] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA

[3] Xiamen Univ, Dept Phys, Xiamen 361005, Peoples R China

[4] Xiamen Univ, Fujian Prov Key Lab Theoret & Computat Chem, Xiamen 361005, Peoples R China

[5] CSIR, Natl Phys Lab, New Delhi 110012, India

来源：

PHYSICAL REVIEW B | 2014年 / 90卷 / 08期

关键词：

THIN-FILMS; MAGNETORESISTANCE; TIME;

D O I：

10.1103/PhysRevB.90.081107

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a study of delta doping at the LaTiO3/SrTiO3 interface with isostructural antiferromagnetic perovskite LaCrO3 that dramatically alters the properties of the two-dimensional electron gas at the interface. The effects include a reduction in sheet-carrier density, prominence of the low-temperature resistivity minimum, enhancement of weak antilocalization below 10 K, and observation of a strong anisotropic magnetoresistance (MR). The positive and negative MR for out-of-plane and in-plane fields, respectively, and the field and temperature dependencies of MR suggest Kondo scattering by localized Ti3+ moments renormalized by spin-orbit interaction at T < 10 K, with the increased delta-layer thickness. Electron-energy-loss spectroscopy and density functional calculations provide convincing evidence of blocking of electron transfer from LTO to STO by the delta layer.

引用

页数：5

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