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

Authors :
Baba, T.
Yokoya, T.
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.
Source :
Physica C. Oct2009, Vol. 469 Issue 15-20, p928-931. 4p.
Publication Year :
2009

Abstract

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 T N. 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. [Copyright &y& Elsevier]

Details

Language :
English
ISSN :
09214534
Volume :
469
Issue :
15-20
Database :
Academic Search Index
Journal :
Physica C
Publication Type :
Academic Journal
Accession number :
43808767
Full Text :
https://doi.org/10.1016/j.physc.2009.05.101