Magnetism, conductivity, and orbital order in (LaMnO3)2n/(SrMnO3)n superlattices

被引：85

作者：

Dong, Shuai ^{[1
,2
,3
]}

Yu, Rong ^{[1
,2
]}

Yunoki, Seiji ^{[4
,5
]}

Alvarez, Gonzalo ^{[6
,7
]}

Liu, J. -M. ^{[3
]}

Dagotto, Elbio ^{[1
,2
]}

机构：

[1] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[2] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

[3] Nanjing Univ, Nanjing Natl Lab Microstruct, Nanjing 210093, Peoples R China

[4] RIKEN, Computat Condensed Matter Phys Lab, Wako, Saitama 3510198, Japan

[5] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320012, Japan

[6] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA

[7] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.78.201102

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The modulation of charge density and spin order in (LaMnO3)(2n)/(SrMnO3)(n) (n=1-4) superlattices is studied via Monte Carlo simulations of the double-exchange model. G-type antiferromagnetic barriers in the SrMnO3 regions with low charge density are found to separate ferromagnetic LaMnO3 layers with high charge density. A metal-insulator transition with increasing n is observed in the direction perpendicular to the interfaces. Our simulations provide insight into how disorder-induced localization may cause the metal-insulator transition occurring at n=3 in experiments.

引用

页数：4

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