Non-Fermi Liquid Behavior and Double-Exchange Physics in Orbital-Selective Mott Systems

Details Non-Fermi Liquid Behavior and Double-Exchange Physics in Orbital-Selective Mott Systems Non-Fermi Liquid Behavior and Double-Exchange Physics in Orbital-Selective Mott Systems

2005-05-30

arxiv.org/abs/cond-mat/0505737v2

Phys. Rev. Lett. 95, 206401 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, minor typos corrected

Scientific paper

10.1103/PhysRevLett.95.206401

We study a multi-band 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 closely related to that of 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.

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