title: ARPES view on surface and bulk hybridization phenomena in the antiferromagnetic Kondo lattice CeRh2Si2.
abstract: The hybridization between localized 4f electrons and itinerant electrons in rare-earth-based materials gives rise to their exotic properties like valence fluctuations, Kondo behaviour, heavy-fermions, or unconventional superconductivity. Here we present an angle-resolved photoemission spectroscopy (ARPES) study of the Kondo lattice antiferromagnet CeRh2Si2, where the surface and bulk Ce-4f spectral responses were clearly resolved. The pronounced 4f (0) peak seen for the Ce terminated surface gets strongly suppressed in the bulk Ce-4f spectra taken from a Si-terminated crystal due to much larger f-d hybridization. Most interestingly, the bulk Ce-4f spectra reveal a fine structure near the Fermi edge reflecting the crystal electric field splitting of the bulk magnetic 4f (1)5/2 state. This structure presents a clear dispersion upon crossing valence states, providing direct evidence of f-d hybridization. Our findings give precise insight into f-d hybridization penomena and highlight their importance in the antiferromagnetic phases of Kondo lattices.
authors.affiliation: Institute of Solid State Physics, Dresden University of Technology, Zellescher Weg 16, D-01062 Dresden, Germany.|Department of Physics, Indian Institute of Technology (Banaras Hindu University), Varanasi 221005, India.
authors.forename: S
authors.initials: S
authors.lastname: Patil
authors.affiliation: Institute of Solid State Physics, Dresden University of Technology, Zellescher Weg 16, D-01062 Dresden, Germany.|Max IV Laboratory, Lund University, Box 118, 22100 Lund, Sweden.
authors.forename: A
authors.initials: A
authors.lastname: Generalov
authors.affiliation: Institute of Solid State Physics, Dresden University of Technology, Zellescher Weg 16, D-01062 Dresden, Germany.|CSNSM, Université Paris-Sud and CNRS/IN2P3, Batiments 104 et 108, 91405 Orsay, France.
authors.forename: M
authors.initials: M
authors.lastname: Güttler
authors.affiliation: Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, D-01187 Dresden, Germany.
authors.forename: P
authors.initials: P
authors.lastname: Kushwaha
authors.affiliation: Institute of Solid State Physics, Dresden University of Technology, Zellescher Weg 16, D-01062 Dresden, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Chikina
authors.affiliation: European Synchrotron Radiation Facility, 71, Avenue des Martyrs, Grenoble 38000, France.
authors.forename: K
authors.initials: K
authors.lastname: Kummer
authors.affiliation: CSNSM, Université Paris-Sud and CNRS/IN2P3, Batiments 104 et 108, 91405 Orsay, France.
authors.forename: T C
authors.initials: TC
authors.lastname: Rödel
authors.affiliation: CSNSM, Université Paris-Sud and CNRS/IN2P3, Batiments 104 et 108, 91405 Orsay, France.
authors.forename: A F
authors.initials: AF
authors.lastname: Santander-Syro
authors.affiliation: Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, D-01187 Dresden, Germany.
authors.forename: N
authors.initials: N
authors.lastname: Caroca-Canales
authors.affiliation: Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, D-01187 Dresden, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Geibel
authors.affiliation: Institute of Solid State Physics, Dresden University of Technology, Zellescher Weg 16, D-01062 Dresden, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Danzenbächer
authors.affiliation: Institute of Solid State Physics, Dresden University of Technology, Zellescher Weg 16, D-01062 Dresden, Germany.|Institute for Metal Physics, National Academy of Sciences of Ukraine, Vernadsky blvd. 36, UA-03142 Kiev, Ukraine.
authors.forename: Yu
authors.initials: Y
authors.lastname: Kucherenko
authors.affiliation: Institute of Solid State Physics, Dresden University of Technology, Zellescher Weg 16, D-01062 Dresden, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Laubschat
authors.affiliation: Randall Laboratory, University of Michigan, 450 Church St, Ann Arbor, Michigan 48109-1040, USA.
authors.forename: J W
authors.initials: JW
authors.lastname: Allen
authors.affiliation: Institute of Solid State Physics, Dresden University of Technology, Zellescher Weg 16, D-01062 Dresden, Germany.|Saint Petersburg State University, Saint Petersburg 198504, Russia.|Donostia International Physics Center (DIPC), Departamento de Fisica de Materiales and CFM-MPC UPV/EHU, 20080 San Sebastian, Spain.|IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain.
authors.forename: D V
authors.initials: DV
authors.lastname: Vyalikh