Table of Contents
ISRN Condensed Matter Physics
Volume 2011 (2011), Article ID 605913, 5 pages
http://dx.doi.org/10.5402/2011/605913
Research Article

Metal-Insulator Transition Temperatures and Excitonic Phases in Vanadium Oxides

Physics and Technology Department, Petrozavodsk State University, Petrozavodsk 185910, Russia

Received 8 August 2011; Accepted 4 September 2011

Academic Editors: S. Balamurugan and S. Nagata

Copyright © 2011 A. L. Pergament. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The possibility of applying the excitonic insulator model to the description of metal-insulator transitions in vanadium oxide Magneli phases is investigated. Based on the Animalu transition metal model potential, the equation for the constant of Coulomb interaction in the theory of excitonic insulator is modified. It is shown that this theory allows the transition temperatures of all the oxides to be calculated. The conformity of the theory with the experimental data concerning the effective mass values for electrons in vanadium oxides is discussed.