Berlin 2008 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 28: Correlated Electrons: Metal-Insulator Transition 1

TT 28.5: Vortrag

Donnerstag, 28. Februar 2008, 10:30–10:45, H 2053

Orbital-selective Mott transitions in a doped two-band Hubbard model — •Eberhard Jakobi, Nils Blümer, and Peter van Dongen — Institute of Physics, KOMET 337, Johannes Gutenberg University Mainz

Within the last few years, it has been established within dynamical mean-field theory (DMFT) that orbital-selective Mott transitions occur in half-filled degenerate two-band Hubbard with different bandwidths under quite general circumstances. We extend extend these studies to the general doped case, using a high-precision quantum Monte Carlo DMFT solver. For sufficiently strong interactions, orbital-selective Mott transitions as a function of total band filling are clearly visible in the band-specific fillings, quasi-particle weights and double occupancies.