Surface superconducting state of heavy-fermion superconductor CeIrIn5 probed by CeIrIn5-Ag junctions

T. Fukui, A. Sumiyama, Y. Oda, Y. Inada, D. Aoki, H. Shishido, Y. Haga, Y. Onuki

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The CeIrIn5-Ag junctions of about 2 × 10-9 cm-2 area have been made using microfabrication techniques, and the surface superconducting state of CeIrIn5, which has two characteristic temperatures T0 and Tc, has been investigated, where T0 and Tc are the transition temperature to zero-resistivity state and the bulk, thermodynamic transition temperature, respectively. The temperature, below which superconducting anomalies are observed, varies from junction to junction, and yet it is always well above Tc=0.4 K. This result, together with no indication of transition at Tc, suggests that at least the surface of CeIrIn5 is in the superconducting state above Tc. The data on the critical current Ic in superconducting anomalies point to the possibility to define a local transition temperature for each junction.

Original languageEnglish
Pages (from-to)261-272
Number of pages12
JournalJournal of Low Temperature Physics
Volume133
Issue number3-4
DOIs
Publication statusPublished - Nov 1 2003
Externally publishedYes

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Keywords

  • CeIrIn-Ag junctions
  • Heavy-fermion superconductors
  • Meissner effect

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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