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Charge disproportionation in quasi-one-dimensional vanadium oxides
- Source :
-
Solid State Communications . Apr2008, Vol. 146 Issue 1/2, p30-34. 5p. - Publication Year :
- 2008
-
Abstract
- Abstract: The vanadium bronzes ()- A x V 2O5 (A=Na+, Ag+, Ca2+, Cu+) are investigated by electron energy-loss spectroscopy (EELS), X-ray absorption near edge spectroscopy and electronic structure calculations. We analysed the fine structural features of experimental spectra in the low-loss region and the vanadium L2,3 and oxygen K ionization edges in correlation with electronic structure of this quasi-one-dimensional conducting system. The different energy separations on the fine structures of the vanadium L3 edge and oxygen K edge arising from ligand field splitting suggest charge disproportionation occurring in ()- A x V 2O5 materials at room temperature. Based on the analysis of the highly-damped valence electron plasmon peak for these materials, the charge distribution among different chains and ladders is briefly discussed. [Copyright &y& Elsevier]
- Subjects :
- *BRONZE
*VANADIUM oxide
*TRANSITION metals
*ELECTRIC conductivity
Subjects
Details
- Language :
- English
- ISSN :
- 00381098
- Volume :
- 146
- Issue :
- 1/2
- Database :
- Academic Search Index
- Journal :
- Solid State Communications
- Publication Type :
- Academic Journal
- Accession number :
- 31306396
- Full Text :
- https://doi.org/10.1016/j.ssc.2008.01.022