Theoretical proposal of a method to identify the pairing symmetry of Fe-pnictide superconductors using ac-josephson effect

D. Inotani, Y. Ohashi

Research output: Contribution to journalArticlepeer-review

Abstract

We theoretically propose a method to detect ±s-wave state in newly discovered Fe-pnictide superconductors, using ac Josephson current through a single-band superconductor/insulator/±s-wave superconductor (S/I/±S) junction. We show that, because of the Riedel anomaly, the ac Josephson current vanishes at some values of biased voltage across the junction. This phenomenon does not occur without the sign difference of order parameters in the two band superconductor, so that the observation of the vanishing ac Josephson current would be a clear signature of ±s-wave pairing symmetry in Fe-pnictides.

Original languageEnglish
Pages (from-to)S499-S501
JournalPhysica C: Superconductivity and its applications
Volume470
Issue numberSUPPL.1
DOIs
Publication statusPublished - 2010 Dec 1

Keywords

  • Fe-pnictide
  • Josephson junction
  • Pairing symmetry

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Theoretical proposal of a method to identify the pairing symmetry of Fe-pnictide superconductors using ac-josephson effect'. Together they form a unique fingerprint.

Cite this