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Cited by 1,076

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Experimental determination of the superconducting pairing state in YBCO from the phase coherence of YBCO-Pb dc SQUIDs

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Wollman, D. A., Van Harlingen, D. J., Lee, W. C., Ginsberg, D. M., Leggett, A. J.·1993·Physical Review Letters

Abstract

We present an experiment designed to determine directly the symmetry of the pairing state in the cuprate superconductors. From the magnetic flux modulation of YBCO-Pb dc SQUIDs, we determine the spatial anisotropy of the phase of the order parameter in single crystals of YBCO. The experimental results are complicated by SQUID asymmetries and the trapping of magnetic vortices, but taken as a whole give rather strong evidence for a phase shift of \ensuremath{\pi} that is predicted for the ${\mathit{d}}_{\mathit{x}}^{2\mathrm{\ensuremath{-}}}$${\mathit{y}}^{2}$ pairing state. This is further corroborated by single junction modulation measurements.

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Metadata

Authors
Wollman, D. A., Van Harlingen, D. J., Lee, W. C., Ginsberg, D. M., & Leggett, A. J.
Venue
Physical Review Letters
Published
1993-09-27
Volume
71
Issue
13
Pages
2134-2137
ISSN
0031-9007 (ISSN-L)
OpenAlex
W1990840069
Cited by
1,076
References
10
FWCI
69.99
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Experimental determination of the superconducting pairing state in YBCO from the phase coherence of YBCO-Pb dc SQUIDs. https://app.cochat.ai/papers/10.1103/physrevlett.71.2134
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Wollman, D. A., Van Harlingen, D. J., Lee, W. C., Ginsberg, D. M., & Leggett, A. J. (1993). Experimental determination of the superconducting pairing state in YBCO from the phase coherence of YBCO-Pb dc SQUIDs. Physical Review Letters. https://doi.org/10.1103/physrevlett.71.2134

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