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

doi:10.1016/j.physc.2007.04.132

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 journal › Article › peer-review

Abstract

We have investigated the electronic structures of antiferromagnetic superconductor ErNi₂B₂C by using laser-photoemission spectroscopy. The observed spectra below the superconducting transition temperature (T_c = 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 (T_N = 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 language	English
Pages (from-to)	634-635
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	460-462 I
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physc.2007.04.132
Publication status	Published - Sept 1 2007

Keywords

Antiferromagnetic superconductor
Photoemission spectroscopy
Superconducting order parameter

ASJC Scopus subject areas

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

Access to Document

10.1016/j.physc.2007.04.132

Cite this

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title = "Laser-photoemission study of antiferromagnetic superconductor ErNi2B2C",

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.",

keywords = "Antiferromagnetic superconductor, Photoemission spectroscopy, Superconducting order parameter",

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

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doi = "10.1016/j.physc.2007.04.132",

language = "English",

volume = "460-462 I",

pages = "634--635",

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issn = "0921-4534",

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TY - JOUR

T1 - Laser-photoemission study of antiferromagnetic superconductor ErNi2B2C

AU - Baba, Teruhisa

AU - Yokoya, Takayoshi

AU - Tsuda, Shunsuke

AU - Kiss, Takayuki

AU - Shimojima, Takahiro

AU - Ishizaka, Kyoko

AU - Shin, Shik

AU - Takeya, Hiroyuki

AU - Hirata, Kazuto

AU - Togashi, Tadashi

AU - Zhang, C.

AU - Chen, C. T.

AU - Watanabe, Shuntaro

PY - 2007/9/1

Y1 - 2007/9/1

N2 - 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.

AB - 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.

KW - Antiferromagnetic superconductor

KW - Photoemission spectroscopy

KW - Superconducting order parameter

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