9,058 research outputs found
Critical Behaviour near the Mott Metal-Insulator Transition in a Two-band Hubbard Model
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 at the -orbital and the charge-transfer energy
between the - and -orbitals. Critical behaviour of the quasiparticle
weight is also obtained analytically as a function of and . The
analytic results are in good agreement with the numerical results of the exact
diagonalization method.Comment: 10 pages, 8 figure
- …