Work

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

Year: 1993

Type: article

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.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.71.2134

Authors: D. A. Wollman, D. J. Van Harlingen, W. C. Lee, D. M. Ginsberg, A. J. Leggett

Institution: University of Illinois Urbana-Champaign

Language: English

Topic: Physics of Superconductivity and Magnetism

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funders: National Science Foundation, Division of Materials Research

OpenAlex ID: W1990840069

FWCI: 66.64

Cites: 17

Cited by: 1,080

Related to: 10