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

2001/09/25 by Yasuo Ohashi, Ohashi, Yasuo, Yoshiaki Ōno +1
Physics and Astronomy · #FOS: Physical sciences #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el

paper · pdf · doi:10.48550/arxiv.cond-mat/0109446

3 pages, 2 figures

arxiv created 2001/09/25 · arxiv updated 2009/11/30

Abstract

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 Δ 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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