Anisotropic breakdown of Fermi liquid quasiparticle excitations in overdoped La2-xSrxCuO4

J. Chang*, M. Mansson, S. Pailhes, T. Claesson, O. J. Lipscombe, S. M. Hayden, L. Patthey, O. Tjernberg, J. Mesot, Stephen M Hayden

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

22 Citations (Scopus)

Abstract

High-temperature superconductivity emerges from an un-conventional metallic state. This has stimulated strong efforts to understand exactly how Fermi liquids breakdown and evolve into an un-conventional metal. A fundamental question is how Fermi liquid quasiparticle excitations break down in momentum space. Here we show, using angle-resolved photoemission spectroscopy, that the Fermi liquid quasiparticle excitations of the overdoped superconducting cuprate La1.77Sr0.23CuO4 is highly anisotropic in momentum space. The quasiparticle scattering and residue behave differently along the Fermi surface and hence the Kadowaki-Wood's relation is not obeyed. This kind of Fermi liquid breakdown may apply to a wide range of strongly correlated metal systems where spin fluctuations are present.

Original languageEnglish
Article number2559
Number of pages5
JournalNature Communications
Volume4
DOIs
Publication statusPublished - Oct 2013

Keywords

  • HIGH-TEMPERATURE SUPERCONDUCTORS
  • QUANTUM CRITICAL-POINT
  • NORMAL-STATE
  • CUPRATE SUPERCONDUCTORS
  • CORRELATED ELECTRONS
  • SURFACE
  • BI2SR2CACU2O8+DELTA
  • TL2BA2CUO6+DELTA
  • TRANSPORT
  • BEHAVIOR

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