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Title

ARPES view on surface and bulk hybridization phenomena in the antiferromagnetic Kondo lattice CeRh2Si2

AuthorsPatil, S.; Generalov, Alexander; Güttler, Monika; Kushwaha, P.; Chikina, Alla; Kummer, Kurt; Rödel, T. C.; Santander-Syro, A. F.; Caroca-Canales, N.; Geibel, Christoph; Danzenbächer, Steffen; Kucherenko, Y.; Laubschat, Clemens; Allen, J. W.; Vyalikh, Denis V.
Issue Date2016
PublisherSpringer Nature
CitationNature Communications 7: 11029 (2016)
AbstractThe 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 15/2 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.
Publisher version (URL)https://doi.org/10.1038/ncomms11029
URIhttp://hdl.handle.net/10261/270387
DOI10.1038/ncomms11029
E-ISSN2041-1723
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