Electron-like Fermi surface and Remnant (pi,0) features in overdoped La(1.78)Sr(0.22)CuO4
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Electron-like Fermi surface and Remnant (pi,0) features in overdoped La(1.78)Sr(0.22)CuO4

  • Author(s): Yoshida, T.
  • Zhou, X.J.
  • Nakamura, M.
  • Kellar, S.A.
  • Bogdanov, P.V.
  • Lu, E.D.
  • Lanzara, A.
  • Hussain, Z.
  • Ino, A.
  • Mizokawa, T.
  • Fujimori, A.
  • Eisaki, H.
  • Kim, C.
  • Shen, Z.-X.
  • Kakeshita, T.
  • Uchida, S.
  • et al.
Abstract

We have performed an angle-resolved photoemission study of overdoped La1.78Sr0.22CuO4, and have observed sharp nodal quasiparticle peaks in the second Brillouin zone that are comparable to data from Bi2Sr2CaCu2O8+d. The data analysis using energy distribution curves, momentum distribution curves and intensity maps all show evidence of an electron-like Fermi surface, which is well explained by band structure calculations. Evidence for many-body effects are also found in the substantial spectral weight remaining below the Fermi level around (pi,0), where the band is predicted to lie above EF.

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