Orbital-selective Mott transitions in the anisotropic two-band Hubbard model at finite temperatures

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dc.creatorKnecht, C.
dc.creatorBlümer, N.
dc.creatorvan Dongen, P. G. J.
dc.date2005-05-04
dc.date.accessioned2026-07-07T03:05:03Z
dc.date.available2026-07-07T03:05:03Z
dc.descriptionThe anisotropic degenerate two-orbital Hubbard model is studied within dynamical mean-field theory at low temperatures. High-precision calculations on the basis of a refined quantum Monte Carlo (QMC) method reveal that two distinct orbital-selective Mott transitions occur for a bandwidth ratio of 2 even in the absence of spin-flip contributions to the Hund exchange. The second transition -- not seen in earlier studies using QMC, iterative perturbation theory, and exact diagonalization -- is clearly exposed in a low-frequency analysis of the self-energy and in local spectra.
dc.description4 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0505106
dc.identifierhttp://arxiv.org/abs/cond-mat/0505106
dc.identifierPhys. Rev. B 72, 081103(R) (2005)
dc.identifierdoi:10.1103/PhysRevB.72.081103
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/26315
dc.subjectStrongly Correlated Electrons
dc.titleOrbital-selective Mott transitions in the anisotropic two-band Hubbard model at finite temperatures
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