Metal-Insulator Transition in Nearly Stoichiometric CaVO3
- 1 January 1993
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 32 (S3)
- https://doi.org/10.7567/jjaps.32s3.451
Abstract
A metal-to-insulator (MI) transition in perovskite-type vanadium oxide CaVO y in the vicinity of oxygen stoichiometry is reported. In spite of good metallic conductivity for Stoichiometric CaVO y (y=3.00), very slight oxidation (y\cong3.05) causes the system to be insulating but does not induce any significant structural changes. This type of MI transition is contrary to that reported on another d 1 system LaTiO y , which is a Mott-Hubbard insulator for y=3.00 but becomes metallic by oxidation. We suggest that in CaVO y , extra oxygens primarily induce additional scattering which causes the metallic CaVO3 to be insulating.Keywords
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