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.
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收藏
页数：5
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