Evidence for complex superconducting order parameter symmetry in the low-temperature Phase of uPt3 from josephson interferometry

J. D. Strand, Dale J Van Harlingen, J. B. Kycia, W. P. Halperin

Research output: Contribution to journalArticlepeer-review

Abstract

We present data on the modulation of the critical current with applied magnetic field in UPt3-Cu-Pb Josephson junctions and SQUIDs. The junctions were fabricated on polished surfaces of UPt3 single crystals. The shape of the resulting diffraction patterns provides phase-sensitive information on the superconducting order parameter. Our corner junction data show asymmetric patterns with respect to magnetic field, indicating a complex order parameter, and both our junction and SQUID measurements point to a phase shift of π, supporting the E2u representation of the order parameter.

Original languageEnglish (US)
Article number197002
JournalPhysical review letters
Volume103
Issue number19
DOIs
StatePublished - Nov 4 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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