Orbital, charge, and spin couplings in Ru25+O9 dimers of Ba3CoRu2O9

被引：18

作者：

Zhou, H. D. ^{[1
]}

Kiswandhi, A. ^{[1
,2
]}

Barlas, Y. ^{[1
]}

Brooks, J. S. ^{[1
,2
]}

Siegrist, T. ^{[1
,3
]}

Li, G. ^{[1
]}

Balicas, L. ^{[1
]}

Cheng, J. G. ^{[4
]}

Rivadulla, F. ^{[5
,6
]}

机构：

[1] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32306 USA

[2] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA

[3] Florida State Univ, Dept Chem & Biomed Engn, Tallahassee, FL 32310 USA

[4] Univ Texas Austin, Texas Mat Inst, Austin, TX 78712 USA

[5] Univ Santiago de Compostela, Ctr Res Biol Chem, Dept Phys Chem, Santiago De Compostela 15782, Spain

[6] Univ Santiago de Compostela, Ctr Invest Quim Biol & Mat Mol CIQUS, Santiago De Compostela 15782, Spain

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 04期

基金：

美国国家科学基金会;

关键词：

METAL-INSULATOR-TRANSITION; MAGNETIC-PROPERTIES; CRYSTAL-STRUCTURE; FE; NI; CO;

D O I：

10.1103/PhysRevB.85.041201

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetic, transport, and structural properties of cold-pressed Ba3CoRu2O9 show (i) an antiferromagnetic transition, (ii) a semiconductor-semiconductor electronic transition where the resistivity is dominated by the electron hopping between the Ru25+O9 dimers with itinerant Ru electrons at high temperatures, and (iii) a hexagonal to orthorhombic structural phase transition. All three transitions occur at 93 K and are related to the Ru5+ ions in the Ru2O9 dimers. The Ru-O bond distortion below 93 K further indicates a possible orbital ordering for Ru5+ ions in isolated Ru2O9 dimers, which accounts for the strong orbital, charge, and spin couplings.

引用

页数：5

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