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The Mott transition in a two-band Hubbard model involving subbands ofdifferent widths is studied as a function of temperature using dynamical meanfield theory combined with exact diagonalization. The phase diagram is shown toexhibit two successive first-order transitions if the full Hund's rule couplingis included. In the absence of spin-flip and pair-exchange terms the lowertransition remains first-order while the upper becomes continuous.Comment: 4 pages, 4 figures improved results for n_s=

Novel Mott Transitions in a Nonisotropic Two-Band Hubbard Model