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Anisotropic breakdown of Fermi liquid quasiparticle excitations in overdoped La2-xSrxCuO4
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Material Physics, MF.ORCID iD: 0000-0002-3086-9642
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Material Physics, MF.
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2013 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 4, 2559- p.Article in journal (Refereed) Published
Abstract [en]

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.
Keyword [en]
High-Temperature Superconductors, Quantum Critical-Point, Normal-State, Cuprate Superconductors, Correlated Electrons, Surface, Bi2sr2cacu2o8+Delta, Tl2ba2cuo6+Delta, Transport, Behavior
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-134750DOI: 10.1038/ncomms3559ISI: 000326470400003Scopus ID: 2-s2.0-84900360420OAI: oai:DiVA.org:kth-134750DiVA: diva2:668214
Funder
Swedish Research Council
Note

QC 20131129

Available from: 2013-11-29 Created: 2013-11-28 Last updated: 2017-12-06Bibliographically approved

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Tjernberg, Oscar

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