Bulk-sensitive laser-ARPES study on the cuprate superconductor YBa 2Cu3O7-δ

M. Okawa; K. Ishizaka; H. Uchiyama; H. Tadatomo; T. Masui; S. Tajima; X. Y. Wang; C. T. Chen; S. Watanabe; A. Chainani; T. Saitoh; S. Shin

doi:10.1016/j.physc.2009.11.070

Bulk-sensitive laser-ARPES study on the cuprate superconductor YBa ₂Cu₃O_7-δ

M. Okawa^*, K. Ishizaka, H. Uchiyama, H. Tadatomo, T. Masui, S. Tajima, X. Y. Wang, C. T. Chen, S. Watanabe, A. Chainani, T. Saitoh, S. Shin

^*Corresponding author for this work

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

2 Citations (Scopus)

Abstract

We investigate the bulk superconducting electronic structure in optimally doped YBa₂Cu₃O_7-δ (YBCO) using laser-excited angle-resolved photoemission spectroscopy. The band dispersions with the dx2-y2-wave like gap opening are observed without being hindered by surface state and CuO chain band due to bulk-sensitivity and/or matrix element effect at hν=6.994eV. The momentum-dependence of the superconducting gap exhibits a nonzero minimum of ∼12 meV along the (0,0)-(π,π) line. In addition, the unusual suppression of the quasiparticle coherence is observed at T/Tc>0.5-0.7.

Original language	English
Pages (from-to)	S62-S64
Journal	Physica C: Superconductivity and its applications
Volume	470
Issue number	SUPPL.1
DOIs	https://doi.org/10.1016/j.physc.2009.11.070
Publication status	Published - 2010 Dec
Externally published	Yes

Keywords

ARPES
Cuprate superconductor
Electronic structure
YBCO

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.2009.11.070

Cite this

@article{9478f638e6614e0e921e73761e10ec02,

title = "Bulk-sensitive laser-ARPES study on the cuprate superconductor YBa 2Cu3O7-δ",

abstract = "We investigate the bulk superconducting electronic structure in optimally doped YBa2Cu3O7-δ (YBCO) using laser-excited angle-resolved photoemission spectroscopy. The band dispersions with the dx2-y2-wave like gap opening are observed without being hindered by surface state and CuO chain band due to bulk-sensitivity and/or matrix element effect at hν=6.994eV. The momentum-dependence of the superconducting gap exhibits a nonzero minimum of ∼12 meV along the (0,0)-(π,π) line. In addition, the unusual suppression of the quasiparticle coherence is observed at T/Tc>0.5-0.7.",

keywords = "ARPES, Cuprate superconductor, Electronic structure, YBCO",

author = "M. Okawa and K. Ishizaka and H. Uchiyama and H. Tadatomo and T. Masui and S. Tajima and Wang, {X. Y.} and Chen, {C. T.} and S. Watanabe and A. Chainani and T. Saitoh and S. Shin",

note = "Funding Information: This work was partially supported by Grants from the Japan Society for the Promotion of Science and the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. One of the authors (M.O.) thanks financial support from the Global COE Program “the Physical Science Frontier”, MEXT, Japan.",

year = "2010",

month = dec,

doi = "10.1016/j.physc.2009.11.070",

language = "English",

volume = "470",

pages = "S62--S64",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

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}

TY - JOUR

T1 - Bulk-sensitive laser-ARPES study on the cuprate superconductor YBa 2Cu3O7-δ

AU - Okawa, M.

AU - Ishizaka, K.

AU - Uchiyama, H.

AU - Tadatomo, H.

AU - Masui, T.

AU - Tajima, S.

AU - Wang, X. Y.

AU - Chen, C. T.

AU - Watanabe, S.

AU - Chainani, A.

AU - Saitoh, T.

AU - Shin, S.

N1 - Funding Information: This work was partially supported by Grants from the Japan Society for the Promotion of Science and the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. One of the authors (M.O.) thanks financial support from the Global COE Program “the Physical Science Frontier”, MEXT, Japan.

PY - 2010/12

Y1 - 2010/12

N2 - We investigate the bulk superconducting electronic structure in optimally doped YBa2Cu3O7-δ (YBCO) using laser-excited angle-resolved photoemission spectroscopy. The band dispersions with the dx2-y2-wave like gap opening are observed without being hindered by surface state and CuO chain band due to bulk-sensitivity and/or matrix element effect at hν=6.994eV. The momentum-dependence of the superconducting gap exhibits a nonzero minimum of ∼12 meV along the (0,0)-(π,π) line. In addition, the unusual suppression of the quasiparticle coherence is observed at T/Tc>0.5-0.7.

AB - We investigate the bulk superconducting electronic structure in optimally doped YBa2Cu3O7-δ (YBCO) using laser-excited angle-resolved photoemission spectroscopy. The band dispersions with the dx2-y2-wave like gap opening are observed without being hindered by surface state and CuO chain band due to bulk-sensitivity and/or matrix element effect at hν=6.994eV. The momentum-dependence of the superconducting gap exhibits a nonzero minimum of ∼12 meV along the (0,0)-(π,π) line. In addition, the unusual suppression of the quasiparticle coherence is observed at T/Tc>0.5-0.7.

KW - ARPES

KW - Cuprate superconductor

KW - Electronic structure

KW - YBCO

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