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

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2 引文 斯高帕斯(Scopus)


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.

頁(從 - 到)S62-S64
期刊Physica C: Superconductivity and its applications
出版狀態Published - 2010 十二月

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學
  • 能源工程與電力技術
  • 電氣與電子工程


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