Laser-photoemission study of antiferromagnetic superconductor ErNi2B2C

Teruhisa Baba, Takayoshi Yokoya, Shunsuke Tsuda, Takayuki Kiss, Takahiro Shimojima, Kyoko Ishizaka, Shik Shin, Hiroyuki Takeya, Kazuto Hirata, Tadashi Togashi, C. Zhang, C. T. Chen, Shuntaro Watanabe

Research output: Contribution to journalArticle

Abstract

We have investigated the electronic structures of antiferromagnetic superconductor ErNi2B2C by using laser-photoemission spectroscopy. The observed spectra below the superconducting transition temperature (Tc = 9.0 K) show a very broad coherent peak and finite density of states at the Fermi level due to strong magnetic pair breaking effects. In addition, we find a dip structure in the temperature dependence of the superconducting order parameter just below the antiferromagnetic ordering temperature (TN = 6.0 K). This behavior can be well interpreted as a result of competition between the rapid evolution of the antiferromagnetic molecular field and the increase of the superconducting condensation energy with decreasing temperature.

Original languageEnglish
Pages (from-to)634-635
Number of pages2
JournalPhysica C: Superconductivity and its Applications
Volume460-462 I
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - Sep 1 2007

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Keywords

  • Antiferromagnetic superconductor
  • Photoemission spectroscopy
  • Superconducting order parameter

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Baba, T., Yokoya, T., Tsuda, S., Kiss, T., Shimojima, T., Ishizaka, K., Shin, S., Takeya, H., Hirata, K., Togashi, T., Zhang, C., Chen, C. T., & Watanabe, S. (2007). Laser-photoemission study of antiferromagnetic superconductor ErNi2B2C. Physica C: Superconductivity and its Applications, 460-462 I(SPEC. ISS.), 634-635. https://doi.org/10.1016/j.physc.2007.04.132