M. Sakai et al., INVESTIGATION OF I-V CHARACTERISTICS OF INTRINSIC JOSEPHSON-JUNCTIONSIN BI-2223 THIN-FILMS, Physica. C, Superconductivity, 293(1-4), 1997, pp. 55-59
We have investigated current-voltage (I-V) characteristics of intrinsi
c Josephson junctions in c-axis-oriented (Bi,Pb)(2)Sr2Ca2Cu3O10+x (Bi-
2223) superconductive thin films. Clear branching structures peculiar
to stacked junctions are observed. We also have evaluated the quasi-pa
rticle current of a single intrinsic junction by adopting the modified
mesa structure. The obtained quasi-particle I-V curve is quite well e
xplained theoretically by assuming d(x2-y2) symmetry for the supercond
uctivity order parameter. (C) 1997 Elsevier Science B.V.