SUPERCONDUCTING INSTABILITY IN THE PERIODIC ANDERSON MODEL

Employing a quantum Monte Carlo simulation we find a pairing instabili ty in the normal state of the infinite dimensional periodic Anderson m odel. Superconductivity arises from a normal state in which the screen ing is protracted and which is clearly not a Fermi liquid. The phase d iagram is reentrant reflecting competition between superconductivity a nd Fermi liquid formation. The estimated superconducting order paramet er is even, but has nodes as a function of frequency. This opens the p ossibility of a temporal node and an effective order parameter compose d of charge pairs and spin excitations.