Mesoscopic fluctuations of Josephson current in high-Tc superconductor junctions

K. Sakamoto, Y. Asano, Y. Tanaka, H. Tsuchiura, J. Inoue, S. Kashiwaya

Research output: Contribution to journalArticlepeer-review

Abstract

The dc Josephson current and its fluctuations in superconductor/dirty normal metal/superconductor junctions are studied numerically by using the recursive Green function method, where a d-wave pairing symmetry is assumed in superconductors as it is in high-Tc materials. The Josephson current is sensitive to the orientation angle (α) between the crystalline axis of the high-Tc superconductors and the normal of the junction interface. When the orientation angle is π/4, the fluctuations of the Josephson current become larger than those with α=0 because of the zero-energy state formed at junction interfaces.

Original languageEnglish
Pages (from-to)221-224
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume412-414
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 2004 Oct 1
Externally publishedYes

Keywords

  • Josephson current
  • Mesoscopic fluctuation
  • Zero-energy state

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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