Phase diagram of the Mott Transition in a two-band Hubbard model in infinite dimensions

Details Phase diagram of the Mott Transition in a two-band Hubbard model in infinite dimensions Phase diagram of the Mott Transition in a two-band Hubbard model in infinite dimensions

2000-10-05

arxiv.org/abs/cond-mat/0010083v4

Eur. Phys. J. B 19, 375 (2001)

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages, 4 figures

Scientific paper

10.1007/s100510170313

The Mott metal-insulator transition in the two-band Hubbard model in infinite dimensions is studied by using the linearized dynamical mean-field theory recently developed by Bulla and Potthoff. The phase boundary of the metal-insulator transition is obtained analytically as a function of the on-site Coulomb interaction at the $d$-orbital, the charge-transfer energy between the $d$- and $p$-orbitals and the hopping integrals between $p-d$, $d-d$ and $p-p$ orbitals. The result is in good agreement with the numerical results obtained from the exact diagonalization method.

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