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

Abstract

We present a study of the anisotropy in the superconducting energy gap in a single crystal of YNi2B2C (Tc~14.6K) using directional point contact spectroscopy. The superconducting energy gap at 2.7K, 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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References in corpus (2)

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• Order parameter node removal in the d-wave superconductor $YB{a}_{2}C{u}_3{O}_{7-x}$ under magnetic field

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