Journal articles
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.
http://hal.in2p3.fr/in2p3-01301130
Contributor : Emilie Bonnardel <>
Submitted on : Monday, April 11, 2016 - 4:33:01 PM
Last modification on : Wednesday, October 14, 2020 - 3:40:10 AM
Contributor : Emilie Bonnardel <>
Submitted on : Monday, April 11, 2016 - 4:33:01 PM
Last modification on : Wednesday, October 14, 2020 - 3:40:10 AM
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