Evidence of gap anisotropy in superconducting YNi2B2C using directional point-contact spectroscopy.

نویسندگان

  • P Raychaudhuri
  • D Jaiswal-Nagar
  • Goutam Sheet
  • S Ramakrishnan
  • H Takeya
چکیده

We present a study of the anisotropy in the superconducting energy gap in a single crystal of YNi2B2C (T(c) approximately 14.6 K) using directional point-contact spectroscopy. The superconducting energy gap at 2.7 K, when measured for I||c, is 4.5 times larger than that for I||a. The energy gaps in the two directions also have different temperature dependences. Our results support a scenario with s + g like symmetry.

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عنوان ژورنال:
  • Physical review letters

دوره 93 15  شماره 

صفحات  -

تاریخ انتشار 2004