Evidence for Complex Superconducting Order Parameter Symmetry in the Low-Temperature Phase of UPt3 from Josephson Interferometry
J. D. Strand, D. J. Van Harlingen, J. B. Kycia, W. P. Halperin
DOI 10.1103/PhysRevLett.103.197002 · Physical Review Letters
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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.
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. | 0.55 | Pressure not reported | onset |
| UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.5 | Pressure not reported | midpoint |
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