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

T. Baba, Takayoshi 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 journalArticle

2 Citations (Scopus)

Abstract

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
Volume469
Issue number15-20
DOIs
Publication statusPublished - Oct 15 2009

Fingerprint

Laser spectroscopy
Photoelectron spectroscopy
Superconducting materials
Electronic structure
Condensation
photoelectric emission
spectroscopy
lasers
Temperature
temperature
condensation
electronic structure
deviation
estimates
predictions
energy

Keywords

  • Antiferromagnetic superconductor
  • Borocarbides
  • Photoemission spectroscopy

ASJC Scopus subject areas

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

Cite this

Effect of antiferromagnetic ordering on temperature dependent superconducting gap in ErNi2B2C : Laser-photoemission spectroscopy. / Baba, T.; Yokoya, Takayoshi; Tsuda, S.; Kiss, T.; Shimojima, T.; Ishizaka, K.; Takeya, H.; Hirata, K.; Nakai, N.; Machida, K.; Togashi, T.; Chen, C. T.; Zhang, C. Q.; Watanabe, S.; Shin, S.

In: Physica C: Superconductivity and its Applications, Vol. 469, No. 15-20, 15.10.2009, p. 928-931.

Research output: Contribution to journalArticle

Baba, T, Yokoya, T, Tsuda, S, Kiss, T, Shimojima, T, Ishizaka, K, Takeya, H, Hirata, K, Nakai, N, Machida, K, Togashi, T, Chen, CT, Zhang, CQ, Watanabe, S & Shin, S 2009, 'Effect of antiferromagnetic ordering on temperature dependent superconducting gap in ErNi2B2C: Laser-photoemission spectroscopy', Physica C: Superconductivity and its Applications, vol. 469, no. 15-20, pp. 928-931. https://doi.org/10.1016/j.physc.2009.05.101
Baba, T. ; Yokoya, Takayoshi ; Tsuda, S. ; Kiss, T. ; Shimojima, T. ; Ishizaka, K. ; Takeya, H. ; Hirata, K. ; Nakai, N. ; Machida, K. ; Togashi, T. ; Chen, C. T. ; Zhang, C. Q. ; Watanabe, S. ; Shin, S. / Effect of antiferromagnetic ordering on temperature dependent superconducting gap in ErNi2B2C : Laser-photoemission spectroscopy. In: Physica C: Superconductivity and its Applications. 2009 ; Vol. 469, No. 15-20. pp. 928-931.
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AU - Tsuda, S.

AU - Kiss, T.

AU - Shimojima, T.

AU - Ishizaka, K.

AU - Takeya, H.

AU - Hirata, K.

AU - Nakai, N.

AU - Machida, K.

AU - Togashi, T.

AU - Chen, C. T.

AU - Zhang, C. Q.

AU - Watanabe, S.

AU - Shin, S.

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AB - 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.

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