Journal of Low Temperature Physics

, Volume 131, Issue 5–6, pp 1095–1099 | Cite as

Superconducting Gap Structure of YNi2B2C Determined by Thermal Conductivity

  • K. Kamata
  • K. Izawa
  • Y. Nakajima
  • Y. Matsuda
  • T. Watanabe
  • M. Nohara
  • H. Takagi
  • H. Takeya
  • K. Hirata
  • P. Thalmeier
  • K. Maki
Article

Abstract

In order to determine the superconducting gap structure of the borocarbide superconductor YNi2B2C, we have measured the angular variation of the c-axis thermal conductivity κzz in magnetic field rotated within the ab-planes. A clear fourfold symmetry with narrow cusps was observed in the angular variation of κzz. These results provide a strong evidence that the gap function has point nodes which are located along the a- and b-axes of the crystal.

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Copyright information

© Plenum Publishing Corporation 2003

Authors and Affiliations

  • K. Kamata
    • 1
  • K. Izawa
    • 1
  • Y. Nakajima
    • 1
  • Y. Matsuda
    • 1
  • T. Watanabe
    • 2
  • M. Nohara
    • 3
  • H. Takagi
    • 3
  • H. Takeya
    • 4
  • K. Hirata
    • 4
  • P. Thalmeier
    • 5
  • K. Maki
    • 5
  1. 1.Institute for Solid State PhysicsUniversity of TokyoKashiwa, ChibaJapan
  2. 2.Department of Applied ChemistryUniversity of TokyoBunkyo-ku, TokyoJapan
  3. 3.Department of Advanced Materials ScienceUniversity of TokyoBunkyo-ku, TokyoJapan
  4. 4.National Institute for Materials ScienceTsukuba, IbarakiJapan
  5. 5.Max-Planck-Institute for the Chemical Physics of SolidDresdenGermany

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