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.
@article{arxiv.2006.13119,
title = {Oxide Fermi liquid universality revealed by electron spectroscopy},
author = {M. Horio and K. P. Kramer and Q. Wang and A. Zaidan and K. von Arx and D. Sutter and C. E. Matt and Y. Sassa and N. C. Plumb and M. Shi and A. Hanff and S. K. Mahatha and H. Bentmann and F. Reinert and S. Rohlf and F. K. Diekmann and J. Buck and M. Kalläne and K. Rossnagel and E. Rienks and V. Granata and R. Fittipaldi and A. Vecchione and T. Ohgi and T. Kawamata and T. Adachi and Y. Koike and A. Fujimori and M. Hoesch and J. Chang},
journal= {arXiv preprint arXiv:2006.13119},
year = {2021}
}