Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2001-09-19
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 4 figures, RevTex 4
Scientific paper
10.1103/PhysRevB.66.020504
An unconventional superconducting phase is explored developing out of a non Fermi-liquid phase of the two-channel Anderson lattice model. It is characterized by a composite order parameter comprising of a local spin or orbital degree of freedom bound to triplet Cooper pairs with an isotropic and a nearest neighbour form factor. The superconducting transition temperature peaks in the moderate intermediate valence regime and vanishes at integral valence. The gap function is non analytic and odd in frequency, and a pseudo-gap develops in the conduction electron density of states which vanishes as $|\omega|$ close to $\omega=0$.
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