title: 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 (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.
authors.affiliation: Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India. pratap@tifr.res.in
authors.forename: P
authors.initials: P
authors.lastname: Raychaudhuri
authors.forename: D
authors.initials: D
authors.lastname: Jaiswal-Nagar
authors.forename: Goutam
authors.initials: G
authors.lastname: Sheet
authors.forename: S
authors.initials: S
authors.lastname: Ramakrishnan
authors.forename: H
authors.initials: H
authors.lastname: Takeya