Semiconductor-metal transitions in NbO2 and Nb1−xVxO2 |
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Authors: | CNR Rao GRama Rao GVSubba Rao |
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Institution: | Department of Chemistry, Indian Institute of Technology, Kanpur-16, India |
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Abstract: | 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 NbNb pairing appear to be important factors in the mechanism of these transitions. In the solid solutions, 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. |
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