High-resolution angle-resolved photoemission study of Pb-substituted Bi2201

T. Sato, Y. Naitoh, T. Kamiyama, T. Takahashi, T. Yokoya, J. Mesot, A. Kaminski, H. Fretwell, J. C. Campuzano, H. Ding, I. Chong, T. Terashima, M. Takano, K. Kadowaki

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1 Citation (Scopus)

Abstract

We have performed a systematic doping-dependent angle-resolved photoemission spectroscopy (ARPES) of Pb-substituted Bi2201 (Bi1.80Pb0.38Sr2.01CuO6-δ) with high energy (7-11 meV) and momentum (0.01 angstrom-1) resolutions. We found that all the samples show a large hole-like Fermi surface centered at (π,π), whose volume changes systematically as a function of doping. The superconducting gap exhibits a dx(2)-y(2)-like anisotropy with a typical gap value of 10-15 meV near (π,0). By comparing with Bi2Sr2CaCu2O8 (Bi2212), we found that the size of superconducting gap is well scaled with the maximum Tc (Tcmax). Doping-dependence of spectral line shape at (π,0) is very similar between Bi2201 and Bi2212, while its energy scale is different by a factor of 4, corresponding to the ratio of Tcmax between the two compounds. These indicate that the superconducting and pseudogap properties are characterized by Tcmax irrespective of the number of CuO2 layers or the BiO superstructure.

Original languageEnglish
Pages (from-to)157-161
Number of pages5
JournalJournal of Physics and Chemistry of Solids
Volume62
Issue number1-2
DOIs
Publication statusPublished - Jan 2001
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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