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Updated: Aug 6, 2026

Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures
Published on: October 9, 2012
Anomalous momentum dependence of the quasiparticle scattering rate in overdoped Bi2Sr2CaCu2O8
P V Bogdanov1, A Lanzara, X J Zhou
1Department of Physics, Applied Physics and Stanford Synchrotron Radiation Laboratory, Stanford University, California 94305, USA.
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 T(c).
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