ARPES lineshapes, coherent to incoherent ratios, and the waterfall self-energy of Bi2212 cuprate superconductors

ORAL

Abstract

We report a detailed lineshape analysis of ARPES data on Bi2212 in which we separate out the sharp coherent peaks from the higher energy incoherent ``background'' portions, which includes and makes up the famous waterfall regions. We find that the ratio of the incoherent to coherent weights scales quadratically with the peak energy of the coherent portion of the spectra over a very wide energy range. We show that this behavior, including the waterfalls, can be understood with a simple model electron self-energy, giving a new and powerful experimental tool for determining self-energy effects in correlated electron systems.

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Authors

  • Qiang Wang

  • Zhe Sun

  • Tanmoy Das

    • LANL
    • Theoretical Division, Los Alamos National Laboratory
    • Northeastern U and LANL

  • Alexander Balatsky

  • Eli Rotenberg

  • Helmuth Berger

    • Ecole Polytechnique Federal de Lausanne
    • Institute of Condensed Matter Physics, EPFL, Switzerland

  • Hiroshi Eisaki

    • Nanoelectronics Research Institute, AIST, Japan
    • AIST, Japan
    • AIST
    • University of Tokyo; CREST, Japan Science and Technology Agency; RIKEN (The Institute of Physical and Chemical Research)

  • Yoshihiro Aiura

  • Daniel Dessau