5,370 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
Prandtl number of lattice Bhatnagar-Gross-Krook fluid
The lattice Bhatnagar-Gross-Krook modeled fluid has an unchangeable unit
Prandtl number. A simple method is introduced in this letter to formulate a
flexible Prandtl number for the modeled fluid. The effectiveness was
demonstrated by numerical simulations of the Couette flow.Comment: 4 pages, uuencoded postscript fil
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