Evidence of gap anisotropy in superconducting YNi2B2C using directional point-contact spectroscopy.
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.
Raychaudhuri
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Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India. pratap@tifr.res.in
Jaiswal-Nagar
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Sheet
Goutam
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Ramakrishnan
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Takeya
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