Staggered Superconductivity in UPt3: A New Phenomenological Approach
Abstract
We present a new Ginzburg-Landau theory for superconductivity in UPt3, based upon a multicomponent order parameter transforming under an irreducible space group representation; the phase is staggered in real space. Our model can explain the H-T-P phase diagram including the tetracritical point for all field directions. We motivate this unconventional superconducting state in terms of odd-in-time-reversal pairing that may arise in one- or two-channel Kondo models, and suggest experimental tests.
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