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Published in

Elsevier, Physica C: Superconductivity and its Applications, (445-448), p. 46-49, 2006

DOI: 10.1016/j.physc.2006.03.074

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Laser-excited ultrahigh-resolution photoemission spectroscopy of borocarbide superconductor RNi2B2C (R=Y and Er)

Journal article published in 2006 by T. Baba, T. Yokoya, S. Tsuda, T. Kiss, T. Shimojima ORCID, S. Shin, T. Togashi, C. T. Chen, C. Q. Zhang, S. Watanabe, T. Watanabe, M. Nohara, H. Takagi
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

We present laser-excited ultrahigh-resolution photoemission spectroscopy of YNi2B2C and ErNi2B2C. The extremely high energy resolution enables us to discuss the superconducting (SC) gap function of YNi2B2C and to measure the density of states which is coexisted between superconductivity and antiferromagnetism in ErNi2B2C. For YNi2B2C, s+g-wave SC gap symmetry cannot reproduce the experimental data, implying importance of taking the complicated electronic structures into consideration. For ErNi2B2C, the observed coherent peak is very broad and finite density of state exists at Fermi level.