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

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

2004-04-14

arxiv.org/abs/cond-mat/0404322v1

Phys. Rev. Lett. 93, 156802 (2004)

Physics

Condensed Matter

Superconductivity

Ps file with figures

Scientific paper

10.1103/PhysRevLett.93.156802

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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