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Bulk-sensitive laser-ARPES study on the cuprate superconductor

✍ Scribed by 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

Publisher: Elsevier Science
Year: 2010
Tongue: English
Weight: 342 KB
Volume: 470
Category: Article
ISSN: 0921-4534
DOI: 10.1016/j.physc.2009.11.070

No coin nor oath required. For personal study only.

✦ Synopsis

We investigate the bulk superconducting electronic structure in optimally doped YBa 2 Cu 3 O 7Àd (YBCO) using laser-excited angle-resolved photoemission spectroscopy. The band dispersions with the d x 2 Ày 2wave 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 hm ¼ 6:994 eV. The momentum-dependence of the superconducting gap exhibits a nonzero minimum of $12 meV along the ð0; 0Þ-ðp; pÞ line. In addition, the unusual suppression of the quasiparticle coherence is observed at T=T c > 0:5-0:7.

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