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Revealing the Orbital Composition of Heavy Fermion Quasiparticles in CeRu2Si2


Kramer, Kevin P; Tazai, Rina; von Arx, Karin; Horio, Masafumi; Küspert, Julia; Wang, Qisi; Sassa, Yasmine; Kim, Timur K; Cacho, Céphise; Rault, Julien E; Le Fèvre, Patrick; Bertran, François; Janoschek, Marc; Gauthier, Nicolas; Mazzone, Daniel; Daou, Ramzy; Chang, Johan (2023). Revealing the Orbital Composition of Heavy Fermion Quasiparticles in CeRu2Si2. Journal of the Physical Society of Japan, 92(10):104701.

Abstract

We present a resonant angle-resolved photoemission spectroscopy (ARPES) study of the electronic band structure and heavy fermion quasiparticles in CeRu2Si2. Using light polarization analysis, considerations of the crystal field environment and hybridization between conduction and f electronic states, we identify the d-electronic orbital character of conduction bands crossing the Fermi level. Resonant ARPES spectra suggest that the localized Ce f states hybridize with eg and t2g states around the zone center. In this fashion, we reveal the orbital structure of the heavy fermion quasiparticles in CeRu2Si2 and discuss its implications for metamagnetism and superconductivity in the related compound CeCu2Si2.

Abstract

We present a resonant angle-resolved photoemission spectroscopy (ARPES) study of the electronic band structure and heavy fermion quasiparticles in CeRu2Si2. Using light polarization analysis, considerations of the crystal field environment and hybridization between conduction and f electronic states, we identify the d-electronic orbital character of conduction bands crossing the Fermi level. Resonant ARPES spectra suggest that the localized Ce f states hybridize with eg and t2g states around the zone center. In this fashion, we reveal the orbital structure of the heavy fermion quasiparticles in CeRu2Si2 and discuss its implications for metamagnetism and superconductivity in the related compound CeCu2Si2.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Scopus Subject Areas:Physical Sciences > General Physics and Astronomy
Uncontrolled Keywords:General Physics and Astronomy
Language:English
Date:15 October 2023
Deposited On:15 Dec 2023 13:03
Last Modified:29 Jun 2024 01:40
Publisher:The Physical Society of Japan
ISSN:0031-9015
OA Status:Hybrid
Publisher DOI:https://doi.org/10.7566/JPSJ.92.104701
  • Content: Published Version
  • Language: English
  • Licence: Creative Commons: Attribution 4.0 International (CC BY 4.0)