ELECTRICAL-PROPERTIES OF 45-DEGREES GRAIN-BOUNDARIES OF EPITAXIAL YBACUO, DOMINATED BY CRYSTALLINE MICROSTRUCTURE AND D-WAVE-SYMMETRY

Authors
COPETTI CA RUDERS F OELZE B BUCHAL C KABIUS B SEO JW
Citation
Ca. Copetti et al., ELECTRICAL-PROPERTIES OF 45-DEGREES GRAIN-BOUNDARIES OF EPITAXIAL YBACUO, DOMINATED BY CRYSTALLINE MICROSTRUCTURE AND D-WAVE-SYMMETRY, Physica. C, Superconductivity, 253(1-2), 1995, pp. 63-70
Citations number
13
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
253
Issue
1-2
Year of publication
1995
Pages
63 - 70
Database
ISI
SICI code
0921-4534(1995)253:1-2<63:EO4GOE>2.0.ZU;2-R
Abstract
We show that the microstructure of 45 degrees grain boundaries in epit axial YBaCuO together with the d(x2-y2) symmetry of the superconductin g wave function accounts for the measured magnetic field modulation pa tterns of the critical currents. Our results resolve the conflict betw een contradictory observations of other authors and unfold a consisten t picture of d-wave-symmetry of the YBaCuO superconducting ground stat e. Evidence for currentless junctions with a phase difference of pi is given.