PHASE COHERENCE IN YBCO-PB SQUIDS - DIRECT EXPERIMENTAL-DETERMINATIONOF THE SYMMETRY OF THE PAIRING STATE IN HIGH-TEMPERATURE SUPERCONDUCTORS

Authors
WOLLMAN DA VANHARLINGEN DJ LEE WC GINSBERG DM LEGGETT AJ
Citation
Da. Wollman et al., PHASE COHERENCE IN YBCO-PB SQUIDS - DIRECT EXPERIMENTAL-DETERMINATIONOF THE SYMMETRY OF THE PAIRING STATE IN HIGH-TEMPERATURE SUPERCONDUCTORS, Physica. B, Condensed matter, 194, 1994, pp. 1669-1670
Citations number
7
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physica. B, Condensed matter → ACNP
ISSN journal
09214526
Volume
194
Year of publication
1994
Part
2
Pages
1669 - 1670
Database
ISI
SICI code
0921-4526(1994)194:<1669:PCIYS->2.0.ZU;2-Q
Abstract
We describe an experiment designed to determine the symmetry of the pa iring state in the cuprate superconductors. By studying the magnetic f lux modulation of a dc SQUID formed by connecting tunnel junctions on the orthogonal faces of a YBCO single crystal with the conventional su perconductor Pb, we can measure the spatial anisotropy of the phase of the order parameter. Preliminary results are complicated by SQUID asy mmetries, but show evidence for a phase shift of pi that is predicted for the d(x2-y2) pairing state.