Anisotropic breakdown of Fermi liquid quasiparticle excitations in overdoped La2-xSrxCuO4
2013 (English)In: Nature Communications, ISSN 2041-1723, Vol. 4, 2559- p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2013. Vol. 4, 2559- p.
High-Temperature Superconductors, Quantum Critical-Point, Normal-State, Cuprate Superconductors, Correlated Electrons, Surface, Bi2sr2cacu2o8+Delta, Tl2ba2cuo6+Delta, Transport, Behavior
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-134750DOI: 10.1038/ncomms3559ISI: 000326470400003ScopusID: 2-s2.0-84900360420OAI: oai:DiVA.org:kth-134750DiVA: diva2:668214
FunderSwedish Research Council
QC 201311292013-11-292013-11-282013-11-29Bibliographically approved