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

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arxiv cond-mat/0404322 v1 pith:REE3LLCJ submitted 2004-04-14 cond-mat.supr-con cond-mat.str-el

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

P. Raychaudhuri , D. Jaiswal-Nagar , Goutam Sheet , S. Ramakrishnan , H. Takeya This is my paper
classification cond-mat.supr-con cond-mat.str-el
keywords energysuperconductinganisotropycontactdirectionalpointspectroscopyyni2b2c
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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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