Orbital, charge, and spin couplings in Ru 25+O9 dimers of Ba3CoRu2O9

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2012_zhou_physicalreviewb_orbital_charge.pdf (362.77 KB)
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URI: http://hdl.handle.net/10347/17038
ISSN: 2469-9950
E-ISSN: 2469-9969
DOI: 10.1103/PhysRevB.85.041201

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2012

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APS Physics
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e 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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Zhou, H., Kiswandhi, A., Barlas, Y., Brooks, J., Siegrist, T., & Li, G. et al. (2012). Orbital, charge, and spin couplings in Ru25+O9dimers of Ba3CoRu2O9. Physical Review B, 85(4). doi: 10.1103/physrevb.85.041201

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This work is supported by NSF-DMR-0654118 and the State of Florida. J.S.B. and A.K. acknowledge support from NSF-DMR-1005293

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© 2012 American Physical Society

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Centro de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS)
Química Física