Anomalous resistivity and the electron-polaron effect in the two-band Hubbard model with one narrow band

Abstract

We search for anomalous normal and superconductive behavior in the two-band Hubbard model with one narrow band. We analyze the influence of electron-polaron effect and Altshuler-Aronov effect on effective mass enhancement and scattering times of heavy and light components in the clean case. We find anomalous behavior of resistivity at high temperatures $T>W_h^{\ast }$ both in 3D and 2D situation. The SC instability in the model is governed by enhanced Kohn-Luttinger effect for p-wave pairing of heavy electrons via polarization of light electrons.

8 pages, 4 figures, accepted for publication in Journal of Superconductivity and Novel Magnetism, based on the invited talk on Stripes XI Conference in Rome, July 2011

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• Fermi surface and heavy masses for UPd${}_2$Al${}_3$
• Phase separation in a two-band model for strongly correlated electrons
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Cited by in corpus (5)

• Electronic phase separation: recent progress in the old problem
• Fermi-Bose mixtures and BCS-BEC crossover in high-Tc superconductors
• Effects of anisotropy and Coulomb interactions on quantum transport in a quadruple quantum-dot structure
• Superstripes and complexity in high-temperature superconductors
• Manifestation of the Upper Hubbard band in the 2D Hubbard model at low electron density