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

C. H. Choi*, J. A. Sauls

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

103 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)484-487
Number of pages4
JournalPhysical review letters
Volume66
Issue number4
DOIs
StatePublished - 1991

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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