J. Mannhart et al., SYMMETRY OF THE ORDER-PARAMETER - IMPLICATIONS FOR THE TRANSPORT-PROPERTIES OF GRAIN-BOUNDARIES, Physica. C, Superconductivity, 282, 1997, pp. 132-135
Implications of a d(x2-y2) symmetry component of the order parameter f
or the transport properties of grain boundaries in high-T-c supercondu
ctors are discussed. Among other effects, the d(x2-y2) symmetry causes
intrinsic weak links, inhomogeneous current distributions in the junc
tions and reduced IcRa products.