Revealing the Orbital Composition of Heavy Fermion Quasiparticles in CeRu2 Si2
Journal article, 2023
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
Author
K. P. Kramer
University of Zürich
Rina Tazai
Nagoya University
K. Von Arx
University of Zürich
M. Horio
University of Zürich
Julia Küspert
University of Zürich
Q. Wang
University of Zürich
Yasmine Sassa
Chalmers, Physics, Materials Physics
T. K. Kim
Diamond Light Source
C. Cacho
Diamond Light Source
Julien E. Rault
SOLEIL Synchrotron
Patrick Le Fèvre
SOLEIL Synchrotron
François Bertran
SOLEIL Synchrotron
Marc Janoschek
University of Zürich
Paul Scherrer Institut
Nicolas Gauthier
Stanford University
Université de Sherbrooke
Daniel G. Mazzone
Laboratory for Neutron Scattering, Villigen
Ramzy Daou
Centre national de la recherche scientifique (CNRS)
J. Chang
University of Zürich
Journal of the Physical Society of Japan
0031-9015 (ISSN) 13474073 (eISSN)
Vol. 92 10 104701Realization of Novel Low‐Dimensional Skyrmion Systems
Swedish Research Council (VR) (2017-05078), 2019-06-01 -- 2021-12-31.
Subject Categories
Condensed Matter Physics
DOI
10.7566/JPSJ.92.104701