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

T. Fukui, A. Sumiyama, Y. Oda, Yoshihiko 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 2003
Externally publishedYes

Fingerprint

Heavy fermion superconductors
heavy fermion superconductors
Superconducting transition temperature
Critical currents
Microfabrication
transition temperature
Thermodynamics
anomalies
Temperature
critical current
indication
thermodynamics
electrical resistivity
temperature

Keywords

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

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Surface superconducting state of heavy-fermion superconductor CeIrIn5 probed by CeIrIn5-Ag junctions. / Fukui, T.; Sumiyama, A.; Oda, Y.; Inada, Yoshihiko; Aoki, D.; Shishido, H.; Haga, Y.; Onuki, Y.

In: Journal of Low Temperature Physics, Vol. 133, No. 3-4, 11.2003, p. 261-272.

Research output: Contribution to journalArticle

Fukui, T. ; Sumiyama, A. ; Oda, Y. ; Inada, Yoshihiko ; Aoki, D. ; Shishido, H. ; Haga, Y. ; Onuki, Y. / Surface superconducting state of heavy-fermion superconductor CeIrIn5 probed by CeIrIn5-Ag junctions. In: Journal of Low Temperature Physics. 2003 ; Vol. 133, No. 3-4. pp. 261-272.
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