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Anisotropic breakdown of Fermi liquid quasiparticle excitations in overdoped La2-xSrxCuO4
KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik, Materialfysik, MF.ORCID-id: 0000-0002-3086-9642
KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik, Materialfysik, MF.
Vise andre og tillknytning
2013 (engelsk)Inngår i: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 4, s. 2559-Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
2013. Vol. 4, s. 2559-
Emneord [en]
High-Temperature Superconductors, Quantum Critical-Point, Normal-State, Cuprate Superconductors, Correlated Electrons, Surface, Bi2sr2cacu2o8+Delta, Tl2ba2cuo6+Delta, Transport, Behavior
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Identifikatorer
URN: urn:nbn:se:kth:diva-134750DOI: 10.1038/ncomms3559ISI: 000326470400003Scopus ID: 2-s2.0-84900360420OAI: oai:DiVA.org:kth-134750DiVA, id: diva2:668214
Forskningsfinansiär
Swedish Research Council
Merknad

QC 20131129

Tilgjengelig fra: 2013-11-29 Laget: 2013-11-28 Sist oppdatert: 2017-12-06bibliografisk kontrollert

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