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

T. Baba, Takayoshi Yokoya, S. Tsuda, T. Kiss, T. Shimojima, S. Shin, T. Togashi, C. T. Chen, C. Q. Zhang, S. Watanabe, T. Watanabe, Minoru Nohara, H. Takagi

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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.

Original languageEnglish
Pages (from-to)46-49
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume445-448
Issue number1-2
DOIs
Publication statusPublished - Oct 1 2006

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Keywords

  • Anisotropic superconductor
  • Antiferromagnetic superconductor
  • Photoemission spectroscopy

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Baba, T., Yokoya, T., Tsuda, S., Kiss, T., Shimojima, T., Shin, S., Togashi, T., Chen, C. T., Zhang, C. Q., Watanabe, S., Watanabe, T., Nohara, M., & Takagi, H. (2006). Laser-excited ultrahigh-resolution photoemission spectroscopy of borocarbide superconductor RNi2B2C (R = Y and Er). Physica C: Superconductivity and its Applications, 445-448(1-2), 46-49. https://doi.org/10.1016/j.physc.2006.03.074