Identification of odd-parity superconductivity in UPt3 from paramagnetic effects on the upper critical field

C. H. Choi; J. A. Sauls

doi:10.1103/PhysRevLett.66.484

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Identification of odd-parity superconductivity in UPt3 from paramagnetic effects on the upper critical field

C. H. Choi, J. A. Sauls

DOI 10.1103/PhysRevLett.66.484 · Physical Review Letters

T1

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Abstract

We present a theoretical explanation of the unusual temperature-dependent anisotropy of Hc2 reported by Shivaram et al. for single crystals of UPt3, which we argue provides strong support for unconventional odd-parity pairing. We show that the observed low-temperature crossover in the anisotropy ratio, Hc2⊥/Hc2?, can be explained by paramagnetic limiting for H parallel to the sixfold axis within BCS pairing theory if the order parameter has odd parity and there is strong spin-orbit coupling of the pair spin to the crystal axes.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown