Josephson current in unconventional superconductors through an Anderson impurity

Authors
Avishai, Y Golub, A
Citation
Y. Avishai et A. Golub, Josephson current in unconventional superconductors through an Anderson impurity, PHYS REV B, 61(17), 2000, pp. 11293-11296
Citations number
16
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
10980121 → ACNP
Volume
61
Issue
17
Year of publication
2000
Pages
11293 - 11296
Database
ISI
SICI code
1098-0121(20000501)61:17<11293:JCIUST>2.0.ZU;2-7
Abstract
Josephson current for a system consisting of an Anderson impurity weakly co upled to two unconventional superconductors is studied and shown to be driv en by a surface zero energy (midgap) bound state. The repulsive Coulomb int eraction in the dot can turn a pi junction into a 0 junction. This effect i s more pronounced in p-wave superconductors while in high-temperature super conductors with d(x2-y2) symmetry it can exist for rather large artificial centers at which tunneling occurs within a finite region.