Effect of antiferromagnetic ordering on temperature dependent superconducting gap in ErNi2B2C: Laser-photoemission spectroscopy

T. Baba, T. Yokoya, S. Tsuda, T. Kiss, T. Shimojima, K. Ishizaka, H. Takeya, K. Hirata, N. Nakai, K. Machida, T. Togashi, C. T. Chen, C. Q. Zhang, S. Watanabe, S. Shin

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


We have performed temperature (T)-dependent laser-photoemission spectroscopy of antiferromagnetic (AF) superconductor ErNi2B2C to study the electronic structure, especially the effect of AF ordering in T-dependent superconducting (SC) gap. To estimate the values of T-dependent SC gap, we fitted the experimental data by Dynes function having an anisotropic s-wave SC gap. From the fitting results, we find a sudden deviation from the BCS prediction just below TN. This observation can be well explained by the theoretical model, indicating that the origin of anomalous T-dependence is competition between rapid evolution of AF molecular field and SC condensation energy.

Original languageEnglish
Pages (from-to)928-931
Number of pages4
JournalPhysica C: Superconductivity and its applications
Issue number15-20
Publication statusPublished - Oct 15 2009


  • Antiferromagnetic superconductor
  • Borocarbides
  • Photoemission spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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