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Orbitally selective breakdown of Fermi liquid quasiparticles in Ca1.8Sr0.2RuO4
Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland.
Coll France, F-75231 Paris 05, France;Univ Paris Saclay, Ctr Phys Theor, CNRS, Ecole Polytech, F-91128 Palaiseau, France.
Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland.
Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland.
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2019 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 99, no 12, article id 121115Article in journal (Refereed) Published
Abstract [en]

We present a comprehensive angle-resolved photoemission spectroscopy study of Ca1.8Sr0.2RuO4. Four distinct bands are revealed and along the Ru-O bond direction their orbital characters are identified through a light polarization analysis and comparison to dynamical mean-field theory calculations. Bands assigned to d(xz),d(yz) orbitals display Fermi liquid behavior with fourfold quasiparticle mass renormalization. Extremely heavy fermions-associated with a predominantly d(xy) band character-are shown to display non-Fermi-liquid behavior. We thus demonstrate that Ca1.8Sr0.2RuO4 is a hybrid metal with an orbitally selective Fermi liquid quasiparticle breakdown.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2019. Vol. 99, no 12, article id 121115
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-382524DOI: 10.1103/PhysRevB.99.121115ISI: 000462901300002OAI: oai:DiVA.org:uu-382524DiVA, id: diva2:1307399
Funder
EU, European Research Council, ERC-319286-QMACWenner-Gren FoundationsAvailable from: 2019-04-26 Created: 2019-04-26 Last updated: 2019-04-26Bibliographically approved

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Sassa, Yasmine

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