The Mott-Hubbard Metal-Insulator Transition in V₂O₃
G. Keller (Theoretische Physik III, Institut für Physik, Universität Augsburg)

Even after more than thirty years of intensive research, the Mott-Hubbard metal-insulator transition in paramagnetic V₂O₃ is still a topic of current experimental and theoretical research. Whereas most metal-insulator transitions are accompanied by a simultaneous lattice symmetry and/or magnetic transition, V₂O₃ has a corundum structure and remains paramagnetic throughout the transition. In this talk, a short introduction to the system V₂O₃ and to the recently developed theoretical investigation scheme LDA+DMFT(QMC) [1] is given. The theoretical results obtained with this method are presented [2] and are compared to high-resolution photoemission experiments and x-ray absorption measurements.

[1] V. I. Anisimov, A. I. Poteryaev, M. A. Korotin, A. O. Anokhin, and G. Kotliar, J. Phys. Cond. Matter 9, p. 7359 (1997)

[2] K. Held, G. Keller, V. Eyert, D. Vollhardt, and V. I. Anisimov, Phys. Rev. Lett. 86, p. 5345 (2001)