TIME-REVERSAL SYMMETRY-BREAKING IN A MODEL OF STAGGERED SUPERCONDUCTIVITY IN UPT3

This paper addresses some experimental consequences of a Ginzburg-Land au model proposed recently for the superconducting phases of UPt3. The model assumes finite center-of-mass momentum of the Cooper pairs and has been shown to be consistent with the observed H-T-P phase diagram. Within this framework, we analyze in more detail the low-temperature time-reversal symmetry breaking phases, and determine how they are con nected to the observed muon spin rotation anomalies. The results are d iscussed in the light of differences to other phenomenological models proposed for UPt3 which are based on point-group representations.