Charge transport and magnetization profile at the interface between the correlated metal CaRuO3 and the antiferromagnetic insulator CaMnO3

被引：57

作者：

Freeland, J. W. ^{[1
]}

Chakhalian, J. ^{[2
]}

Boris, A. V. ^{[3
,4
]}

Tonnerre, J. -M. ^{[5
,6
]}

Kavich, J. J. ^{[7
]}

Yordanov, P. ^{[3
]}

Grenier, S. ^{[5
,6
]}

Zschack, P. ^{[1
]}

Karapetrova, E. ^{[1
]}

Popovich, P. ^{[3
]}

Lee, H. N. ^{[8
]}

Keimer, B. ^{[3
]}

机构：

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

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

[3] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[4] Univ Loughborough, Dept Phys, Loughborough LE11 3TU, Leics, England

[5] CNRS, Inst Neel, F-38043 Grenoble 9, France

[6] Univ Grenoble 1, F-38043 Grenoble 9, France

[7] Univ Illinois, Dept Phys, Chicago, IL 60607 USA

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

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 09期

基金：

美国国家科学基金会;

关键词：

RAY-ABSORPTION-SPECTROSCOPY; ELECTRONIC-STRUCTURE; TRANSITION; MAGNETISM;

D O I：

10.1103/PhysRevB.81.094414

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A combination of spectroscopic probes was used to develop a detailed experimental description of the transport and magnetic properties of superlattices composed of the paramagnetic metal CaRuO3 and the antiferromagnetic insulator CaMnO3. The charge-carrier density and Ru valence state in the superlattices are not significantly different from those of bulk CaRuO3. The small charge transfer across the interface implied by these observations confirms predictions derived from density-functional calculations. However, a ferromagnetic polarization due to canted Mn spins penetrates 3-4 unit cells into CaMnO3, far exceeding the corresponding predictions. The discrepancy may indicate the formation of magnetic polarons at the interface.

引用

页数：7

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