High-resolution ARPES study of electron-doped Fe-based superconductor BaFe1.85Co0.15As2

T. Kawahara; K. Terashima; Y. Sekiba; J. H. Bowen; K. Nakayama; T. Sato; P. Richard; Y. M. Xu; L. J. Li; G. H. Cao; Z. A. Xu; H. Ding; T. Takahashi

doi:10.1016/j.physc.2009.11.129

High-resolution ARPES study of electron-doped Fe-based superconductor BaFe_1.85Co_0.15As₂

T. Kawahara, K. Terashima, Y. Sekiba, J. H. Bowen, K. Nakayama, T. Sato, P. Richard, Y. M. Xu, L. J. Li, G. H. Cao, Z. A. Xu, H. Ding, T. Takahashi

Graduate School of Natural Science and Technology

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

5 Citations (Scopus)

Abstract

We have performed high-resolution angle-resolved photoemission spectroscopy of an electron-doped iron-based superconductor BaFe_1.85Co _0.15As₂, and experimentally determined the Fermi-surface, the band structure and the superconducting gap. We found an isotropic s-wave-like superconducting gap on a hole pocket centered at the Γ point and on electron pockets at the M point. The superconducting gap magnitude is significantly enhanced on the Fermi-surfaces connected by the antiferromagnetic wave vector, suggesting the importance of an interband interaction on the pairing mechanism.

Original language	English
Pages (from-to)	S440-S442
Journal	Physica C: Superconductivity and its applications
Volume	470
Issue number	SUPPL.1
DOIs	https://doi.org/10.1016/j.physc.2009.11.129
Publication status	Published - Dec 2010

Keywords

ARPES
Iron-based superconductor
Superconducting gap

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.2009.11.129

Cite this

Kawahara, T., Terashima, K., Sekiba, Y., Bowen, J. H., Nakayama, K., Sato, T., Richard, P., Xu, Y. M., Li, L. J., Cao, G. H., Xu, Z. A., Ding, H., & Takahashi, T. (2010). High-resolution ARPES study of electron-doped Fe-based superconductor BaFe_1.85Co_0.15As₂. Physica C: Superconductivity and its applications, 470(SUPPL.1), S440-S442. https://doi.org/10.1016/j.physc.2009.11.129

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abstract = "We have performed high-resolution angle-resolved photoemission spectroscopy of an electron-doped iron-based superconductor BaFe1.85Co 0.15As2, and experimentally determined the Fermi-surface, the band structure and the superconducting gap. We found an isotropic s-wave-like superconducting gap on a hole pocket centered at the Γ point and on electron pockets at the M point. The superconducting gap magnitude is significantly enhanced on the Fermi-surfaces connected by the antiferromagnetic wave vector, suggesting the importance of an interband interaction on the pairing mechanism.",

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AU - Kawahara, T.

AU - Terashima, K.

AU - Sekiba, Y.

AU - Bowen, J. H.

AU - Nakayama, K.

AU - Sato, T.

AU - Richard, P.

AU - Xu, Y. M.

AU - Li, L. J.

AU - Cao, G. H.

AU - Xu, Z. A.

AU - Ding, H.

AU - Takahashi, T.

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AB - We have performed high-resolution angle-resolved photoemission spectroscopy of an electron-doped iron-based superconductor BaFe1.85Co 0.15As2, and experimentally determined the Fermi-surface, the band structure and the superconducting gap. We found an isotropic s-wave-like superconducting gap on a hole pocket centered at the Γ point and on electron pockets at the M point. The superconducting gap magnitude is significantly enhanced on the Fermi-surfaces connected by the antiferromagnetic wave vector, suggesting the importance of an interband interaction on the pairing mechanism.

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