Tunneling break-junction measurements of the superconducting gap in Y 2C3

T. Ekino, A. Sugimoto, A. M. Gabovich, H. Kinoshita, Jun Akimitsu

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4 Citations (Scopus)

Abstract

Tunneling measurements of the electron spectrum in the superconducting state have been carried out in Y2C3 samples with the bulk (resistive and diamagnetic) critical temperature Tc = 15-16 K. A break-junction technique was crucial to find the intrinsic gap features. The representative gap structure at 4 K reveals distinct BCS-like peaks with the gap value of 2Δ(4 K) = 3-4 meV. Assuming local Tc values of 10-13 K, the characteristic gap to Tc ratio 2Δ/kBT c (kB is the Boltzmann constant) was found to possess the BCS weak-coupling value 3.5 ± 0.2, appropriate to isotropic s-wave superconductors.

Original languageEnglish
Pages (from-to)52-55
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume484
DOIs
Publication statusPublished - Jan 15 2013
Externally publishedYes

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Keywords

  • Break junction
  • Superconducting energy gap
  • Tunneling
  • YC

ASJC Scopus subject areas

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

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