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

2004/04/14 by P. Raychaudhuri, D. Jaiswal-Nagar, Goutam Sheet +2 · 1 citation
Physics and Astronomy · #cond-mat.supr-con #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.93.156802

published as Phys. Rev. Lett. 93, 156802 (2004) · Ps file with figures

arxiv created 2004/04/14 · arxiv updated 2009/12/01

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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