Semiconductor-metal transitions in NbO2 and Nb1-xVxO2

Rao, C. N. R. ; Rama Rao, G. ; Subba Rao, G. V. (1973) Semiconductor-metal transitions in NbO2 and Nb1-xVxO2 Journal of Solid State Chemistry, 6 (3). pp. 340-343. ISSN 0022-4596

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NbO2, Nb0.98V0.02O2, and Nb0.95V0.05O2 transform from semiconducting to metallic state at temperatures higher than the DTA phase-transition temperatures. Vibrational mode softening and c-axis Nb---Nb pairing appear to be important factors in the mechanism of these transitions. In the solid solutions, c/a ratio is maximum at x = 0.5 since the metal-metal interaction along the c axis becomes minimum; conductivity is minimum at this composition since there are no mobile electrons.

Item Type:Article
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ID Code:51986
Deposited On:01 Aug 2011 14:25
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