ARPES view on surface and bulk hybridization phenomena in the antiferromagnetic Kondo lattice CeRh2Si2
(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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- author
- organization
- publishing date
- 2016-03-18
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Nature Communications
- volume
- 7
- article number
- 11029
- publisher
- Nature Publishing Group
- external identifiers
-
- pmid:26987899
- wos:000372409800001
- scopus:84961659964
- ISSN
- 2041-1723
- DOI
- 10.1038/ncomms11029
- language
- English
- LU publication?
- yes
- id
- 30c4409a-6733-47f5-b373-de5d46dccf8f
- date added to LUP
- 2016-06-29 13:34:39
- date last changed
- 2025-01-12 08:11:59
@article{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 = {{Nature Publishing Group}}, 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}}, doi = {{10.1038/ncomms11029}}, volume = {{7}}, year = {{2016}}, }