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1.
  • Aad, G, et al. (author)
  • 2015
  • swepub:Mat__t
  •  
2.
  • Horio, M., et al. (author)
  • Oxide Fermi liquid universality revealed by electron spectroscopy
  • 2020
  • In: Physical Review B. - 2469-9969 .- 2469-9950. ; 102:24
  • Journal article (peer-reviewed)abstract
    • We present a combined soft x-ray and high-resolution vacuum-ultraviolet angle-resolved photoemission spectroscopy study of the electron-overdoped cuprate Pr1.3-xLa0.7CexCuO4 (PLCCO). Demonstration of its highly two-dimensional band structure enabled precise determination of the in-plane self-energy dominated by electron-electron scattering. Through analysis of this self-energy and the Fermi liquid cut-off energy scale, we find-in contrast to hole-doped cuprates-a momentum isotropic and comparatively weak electron correlation in PLCCO. Yet, the self-energies extracted from multiple oxide systems combine to demonstrate a logarithmic divergent relation between the quasiparticle scattering rate and mass. This constitutes a spectroscopic version of the Kadowaki-Woods relation with an important merit-the demonstration of Fermi liquid quasiparticle lifetime and mass being set by a single energy scale.
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