期刊
PHYSICAL REVIEW LETTERS
卷 103, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.103.197002
关键词
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资金
- NSF [DMR07-05214]
- DOE Basic Energy Sciences [DE-FG02-05ER46248]
- U.S. Department of Energy (DOE) [DE-FG02-05ER46248] Funding Source: U.S. Department of Energy (DOE)
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0705214] Funding Source: National Science Foundation
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 pi, supporting the E-2u representation of the order parameter.
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