d -wave superconductivity in the large-degeneracy limit of the Anderson lattice
M. Lavagna, A. J. Millis, P. A. Lee
DOI 10.1103/PhysRevLett.58.266 · Physical Review Letters
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Abstract
We show, within a Kondo-boson 1/N expansion, that the infinite-U lattice Anderson model is unstable to d-wave superconductivity in the limit in which the model describes heavy-fermion behavior. The pairing mechanism is Kondo-boson exchange between heavy quasiparticles found in mean-field theory. The model is extended to include the Coulomb pseudopotential.
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