Phys. Rev. Lett. 95, 206401 (2005) [4 pages]Non-Fermi-Liquid Behavior and Double-Exchange Physics in Orbital-Selective Mott SystemsReceived 1 June 2005; published 11 November 2005 We study a multiband Hubbard model in its orbital-selective Mott phase, in which localized electrons in a narrow band coexist with itinerant electrons in a wide band. The low-energy physics of this phase is shown to be given by a generalized double-exchange model. The high-temperature disordered phase thus differs from a Fermi liquid, and displays a finite scattering rate of the conduction electrons at the Fermi level, which depends continuously on the spin anisotropy. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.206401
DOI:
10.1103/PhysRevLett.95.206401
PACS:
71.27.+a, 71.10.−w, 71.30.+h
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