Anomalous momentum dependence of the quasiparticle scattering rate in overdoped Bi2Sr2CaCu2O8
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Anomalous momentum dependence of the quasiparticle scattering rate in overdoped Bi2Sr2CaCu2O8

  • Author(s): Bogdanov, P.V.
  • Lanzara, A.
  • Zhou, X.J.
  • Yang, W.L.
  • Eisaki, H.
  • Hussain, Z.
  • Shen, Z.X.
  • et al.
Abstract

The question of the anisotropy of the electron scattering in high temperature superconductors is investigated using high resolution angle-resolved photoemission data from Pb-doped Bi2Sr2CaCu2O8(Bi2212) with suppressed superstructure. The scattering rate of low energy electrons along two bilayer split pieces of the Fermi surface is measured (via the quasiparticle peak width), and no increase of scattering towards the antinode (Pi,0) region is observed, contradicting the expectation from Q=(Pi, Pi) scattering. The results put a limit on the effects of Q=(Pi, Pi) scattering on the electronic structure of this overdoped superconductor with still very high Tc.

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