Nov 19, 2002
Towards a model Hamiltonian for V2O3
George Sawatzky, University of British Columbia
I will present our conclusions concerning an appropriate model Hamiltonian
for V2O3. This is based on LDA, LDA+U calculations as well as tight binding
fit's to the band structure. We find that the c axis pair hopping is not as
important as has been suggested in the past and that other hopping integrals
result in large band dispersions. I will also stress the importance of the
unoccupied 3d eg orbitals and their very strong covalency with the Oxygen 2p
bands in determining the low energy scale physics of V2O3.
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