Orbitally Degenerate Spin-1 Model for Insulating V2O3
F. Mila, R. Shiina, F. -C. Zhang, A. Joshi, M. Ma, V. Anisimov, T. M. Rice
Abstract
Motivated by recent neutron, X-ray absorption and resonant scattering experiments, we revisit the electronic structure of V2O3. We propose a model in which S=1 V3+ ions are coupled in the vertical V-V pairs forming two-fold orbitally degenerate configurations with S=2. Ferro-orbital ordering of the V-V pairs gives a description which is consistent with all experiments in the antiferromagnetic insulating phase.
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