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

Patil, S. LU ; Generalov, A. LU ; Güttler, M.; Kushwaha, P.; Chikina, A.; Kummer, K.; Rödel, T. C.; Santander-Syro, A. F.; Caroca-Canales, N. and Geibel, C., et al. (2016) In Nature Communications 7.
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 4f0 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... (More)

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 4f0 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 4f15/2 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.

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Nature Communications
volume
7
publisher
Nature Publishing Group
external identifiers
  • Scopus:84961659964
ISSN
2041-1723
DOI
10.1038/ncomms11029
language
English
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yes
id
30c4409a-6733-47f5-b373-de5d46dccf8f
date added to LUP
2016-06-29 13:34:39
date last changed
2016-10-27 12:42:43
@misc{30c4409a-6733-47f5-b373-de5d46dccf8f,
  abstract     = {<p>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 CeRh<sub>2</sub>Si<sub>2</sub>, where the surface and bulk Ce-4f spectral responses were clearly resolved. The pronounced 4f<sup>0</sup> 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<sup>1</sup><sub>5/2</sub> 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.</p>},
  author       = {Patil, S. and Generalov, A. and Güttler, M. and Kushwaha, P. and Chikina, A. and Kummer, K. and Rödel, T. C. and Santander-Syro, A. F. and Caroca-Canales, N. and Geibel, C. and Danzenbächer, S. and Kucherenko, Yu and Laubschat, C. and Allen, J. W. and Vyalikh, D. V.},
  issn         = {2041-1723},
  language     = {eng},
  month        = {03},
  publisher    = {ARRAY(0x8fd72c8)},
  series       = {Nature Communications},
  title        = {ARPES view on surface and bulk hybridization phenomena in the antiferromagnetic Kondo lattice CeRh<sub>2</sub>Si<sub>2</sub>},
  url          = {http://dx.doi.org/10.1038/ncomms11029},
  volume       = {7},
  year         = {2016},
}