Laser-excited ultrahigh-resolution photoemission spectroscopy of borocarbide superconductor RNi2B2C (R = Y and Er)

T. Baba; T. Yokoya; S. Tsuda; T. Kiss; T. Shimojima; S. Shin; T. Togashi; C. T. Chen; C. Q. Zhang; S. Watanabe; T. Watanabe; M. Nohara; H. Takagi

doi:10.1016/j.physc.2006.03.074

Laser-excited ultrahigh-resolution photoemission spectroscopy of borocarbide superconductor RNi₂B₂C (R = Y and Er)

T. Baba, T. Yokoya, S. Tsuda, T. Kiss, T. Shimojima, S. Shin, T. Togashi, C. T. Chen, C. Q. Zhang, S. Watanabe, T. Watanabe, M. Nohara, H. Takagi

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

We present laser-excited ultrahigh-resolution photoemission spectroscopy of YNi₂B₂C and ErNi₂B₂C. The extremely high energy resolution enables us to discuss the superconducting (SC) gap function of YNi₂B₂C and to measure the density of states which is coexisted between superconductivity and antiferromagnetism in ErNi₂B₂C. For YNi₂B₂C, s + g-wave SC gap symmetry cannot reproduce the experimental data, implying importance of taking the complicated electronic structures into consideration. For ErNi₂B₂C, the observed coherent peak is very broad and finite density of state exists at Fermi level.

Original language	English
Pages (from-to)	46-49
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	445-448
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physc.2006.03.074
Publication status	Published - Oct 1 2006

Keywords

Anisotropic superconductor
Antiferromagnetic superconductor
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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Baba, T., Yokoya, T., Tsuda, S., Kiss, T., Shimojima, T., Shin, S., Togashi, T., Chen, C. T., Zhang, C. Q., Watanabe, S., Watanabe, T., Nohara, M., & Takagi, H. (2006). Laser-excited ultrahigh-resolution photoemission spectroscopy of borocarbide superconductor RNi₂B₂C (R = Y and Er). Physica C: Superconductivity and its applications, 445-448(1-2), 46-49. https://doi.org/10.1016/j.physc.2006.03.074

Laser-excited ultrahigh-resolution photoemission spectroscopy of borocarbide superconductor RNi₂B₂C (R = Y and Er). / Baba, T.; Yokoya, T.; Tsuda, S.; Kiss, T.; Shimojima, T.; Shin, S.; Togashi, T.; Chen, C. T.; Zhang, C. Q.; Watanabe, S.; Watanabe, T.; Nohara, M.; Takagi, H.

In: Physica C: Superconductivity and its applications, Vol. 445-448, No. 1-2, 01.10.2006, p. 46-49.

Research output: Contribution to journal › Article › peer-review

Baba, T, Yokoya, T, Tsuda, S, Kiss, T, Shimojima, T, Shin, S, Togashi, T, Chen, CT, Zhang, CQ, Watanabe, S, Watanabe, T, Nohara, M & Takagi, H 2006, 'Laser-excited ultrahigh-resolution photoemission spectroscopy of borocarbide superconductor RNi₂B₂C (R = Y and Er)', Physica C: Superconductivity and its applications, vol. 445-448, no. 1-2, pp. 46-49. https://doi.org/10.1016/j.physc.2006.03.074

Baba, T. ; Yokoya, T. ; Tsuda, S. ; Kiss, T. ; Shimojima, T. ; Shin, S. ; Togashi, T. ; Chen, C. T. ; Zhang, C. Q. ; Watanabe, S. ; Watanabe, T. ; Nohara, M. ; Takagi, H. / Laser-excited ultrahigh-resolution photoemission spectroscopy of borocarbide superconductor RNi₂B₂C (R = Y and Er). In: Physica C: Superconductivity and its applications. 2006 ; Vol. 445-448, No. 1-2. pp. 46-49.

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title = "Laser-excited ultrahigh-resolution photoemission spectroscopy of borocarbide superconductor RNi2B2C (R = Y and Er)",

abstract = "We present laser-excited ultrahigh-resolution photoemission spectroscopy of YNi2B2C and ErNi2B2C. The extremely high energy resolution enables us to discuss the superconducting (SC) gap function of YNi2B2C and to measure the density of states which is coexisted between superconductivity and antiferromagnetism in ErNi2B2C. For YNi2B2C, s + g-wave SC gap symmetry cannot reproduce the experimental data, implying importance of taking the complicated electronic structures into consideration. For ErNi2B2C, the observed coherent peak is very broad and finite density of state exists at Fermi level.",

keywords = "Anisotropic superconductor, Antiferromagnetic superconductor, Photoemission spectroscopy",

author = "T. Baba and T. Yokoya and S. Tsuda and T. Kiss and T. Shimojima and S. Shin and T. Togashi and Chen, {C. T.} and Zhang, {C. Q.} and S. Watanabe and T. Watanabe and M. Nohara and H. Takagi",

note = "Funding Information: This study was supported by Grant-in-aid from the Ministry of Education, Science, and Culture of Japan. T.B. thanks center of excellence for applied physics in the University of Tokyo on strong correlation for financial support.",

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AU - Baba, T.

AU - Yokoya, T.

AU - Tsuda, S.

AU - Kiss, T.

AU - Shimojima, T.

AU - Shin, S.

AU - Togashi, T.

AU - Chen, C. T.

AU - Zhang, C. Q.

AU - Watanabe, S.

AU - Watanabe, T.

AU - Nohara, M.

AU - Takagi, H.

N1 - Funding Information: This study was supported by Grant-in-aid from the Ministry of Education, Science, and Culture of Japan. T.B. thanks center of excellence for applied physics in the University of Tokyo on strong correlation for financial support.

PY - 2006/10/1

Y1 - 2006/10/1

N2 - We present laser-excited ultrahigh-resolution photoemission spectroscopy of YNi2B2C and ErNi2B2C. The extremely high energy resolution enables us to discuss the superconducting (SC) gap function of YNi2B2C and to measure the density of states which is coexisted between superconductivity and antiferromagnetism in ErNi2B2C. For YNi2B2C, s + g-wave SC gap symmetry cannot reproduce the experimental data, implying importance of taking the complicated electronic structures into consideration. For ErNi2B2C, the observed coherent peak is very broad and finite density of state exists at Fermi level.

AB - We present laser-excited ultrahigh-resolution photoemission spectroscopy of YNi2B2C and ErNi2B2C. The extremely high energy resolution enables us to discuss the superconducting (SC) gap function of YNi2B2C and to measure the density of states which is coexisted between superconductivity and antiferromagnetism in ErNi2B2C. For YNi2B2C, s + g-wave SC gap symmetry cannot reproduce the experimental data, implying importance of taking the complicated electronic structures into consideration. For ErNi2B2C, the observed coherent peak is very broad and finite density of state exists at Fermi level.

KW - Anisotropic superconductor

KW - Antiferromagnetic superconductor

KW - Photoemission spectroscopy

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