Effects of interface roughness on d-wave Josephson junctions

S. Shirai, H. Tsuchiura, Y. Tanaka, J. I. Inoue, S. Kashiwaya

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The Josephson current-phase relations in d-wave/d-wave superconductor junctions in the tunnel limit are studied using the two-dimensional extended-Hubbard model. The order parameters are determined in a self-consistent way within the Bogoliubov-de Gennes theory. In this study, we calculate the case of (110) oriented junction which have the atomic scale roughness on their interfaces. In uniform junctions, the anomalous current-phase relation obtained within a quasiclassical theory is qualitatively reproduced. On the other hand, in the junctions with an interface impurity, that anomalous relation disappears.

Original languageEnglish
Pages (from-to)1584-1587
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume357-360
Issue numberSUPPL. 1
DOIs
Publication statusPublished - 2001 Sep

Keywords

  • Hubbard model
  • Interface roughness
  • Josephson junctions
  • d-wave superconductor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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