Superconducting Instability in the Periodic Anderson Model
arXiv:cond-mat/9804162 · doi:10.1080/13642819808206733
Abstract
Employing a quantum Monte Carlo simulation we find a pairing instability in the normal state of the infinite dimensional periodic Anderson model. Superconductivity arises from a normal state in which the screening is protracted and which is clearly not a Fermi liquid. The phase diagram is reentrant reflecting competition between superconductivity and Fermi liquid formation. The estimated superconducting order parameter is even, but has nodes as a function of frequency. This opens the possibility of a temporal node and an effective order parameter composed of charge pairs and spin excitations.
one postscript file, 6 pages including 6 figures. To appear in Phil. Mag. B