Angular position of nodes in the superconducting gap of 2D unconventional superconductors

K. Izawa, H. Yamaguchi, Yuji Matsuda, T. Sasaki, T. Fukase, Y. Yoshida, R. Settai, Y. Onuki

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


The superconducting gap structure, especially the direction of the nodes, is an unresolved issue in most of unconventional superconductors. Here, we have measured the thermal conductivity of 2D unconventional superconductors, spin-triplet Sr2RuO4 and heavy fermion CeCoIn5, in magnetic field rotating within the planes. On the basis of the angular variation of the thermal conductivity, we demonstrate that the gap function of Sr2RuO4 is d(k)=Δ0ẑ(kx+iky)(cos ckz+α), and the gap function of CeCoIn5 is dx2-y2.

Original languageEnglish
Pages (from-to)15-19
Number of pages5
JournalPhysica C: Superconductivity and its applications
Issue number1-4
Publication statusPublished - 2002 Feb 15


  • Anisotropic superconductor
  • Gap function
  • Thermal conductivity

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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