Opening of a charge gap with v trimerization in BaV10 O15

Physical Review B - Condensed Matter and Materials Physics

Volumn 81, Issue 6, 2010, Pages

  Kajita, T ^a   Kanzaki, T ^a   Suzuki, T ^a   Kim, J E ^b   Kato, K ^b,c   Takata, M ^b,c   Katsufuji, T ^a,d  

^a WASEDA UNIVERSITY   (Japan)

^b JAPAN SYNCHROTRON RADIATION RESEARCH INSTITUTE   (Japan)

^c RIKEN   (Japan)

^d JAPAN SCIENCE AND TECHNOLOGY AGENCY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 77954832389     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.81.060405     Document Type: Article

References (18)

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13. T c = 123 K of the present single crystal estimated by the anomaly on the cooling run is by several degrees lower than that of the sample with " Tc = 135 K " reported in Ref., whose differential scanning calorimeter data has a peak at 127 K on the cooling run. It is speculated that this difference is caused by a small amount of excess oxygen existing in our crystal.
14. See supplementary material at http://link.aps.org/supplemental/10.1103/ PhysRevB.81.060405 for the detailed result of the crystal structure and the analysis of resistivity and optical conductivity.
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17. In the vanadate Mott insulators, the Mott excitation (between neighboring V ions) and the excitation between V and oxygen ions exist above 1 eV (Refs.). We speculate that in the present BaV 10 O 15, the excitation between trimerized V ions and untrimerized V ions, and between V and oxygen ions, are dominant in the σ (ω) spectra above 1 eV.
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