Critical Behaviour near the Mott Transition in a Two-Band Hubbard Model

Details Critical Behaviour near the Mott Transition in a Two-Band Hubbard Model Critical Behaviour near the Mott Transition in a Two-Band Hubbard Model

2001-09-25

arxiv.org/abs/cond-mat/0109446v1

Physics

Condensed Matter

Strongly Correlated Electrons

3 pages, 2 figures

Scientific paper

The Mott metal-insulator transition in the two-band Hubbard model in infinite dimensions is studied by using the linearized dynamical mean-field theory. The discontinuity in the chemical potential for the change from hole to electron doping is calculated analytically as a function of the on-site Coulomb interaction $U$, and the charge-transfer energy $\Delta$ between the $d$- and $p$-orbitals, transfer integrals $t_{pd}$, $t_{pp}$, $t_{dd}$ between $p$-$d$, $p$-$p$ and $d$-$d$ sites respectively. The critical behaviour of the quasiparticle weight is also obtained analytically.

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