ARPES view on surface and bulk hybridization phenomena in the antiferromagnetic Kondo lattice CeRh2Si2
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
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 degrees 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(5/2)(1) 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.
Details
Original language | English |
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Article number | 11029 |
Number of pages | 8 |
Journal | Nature communications |
Volume | 7 |
Publication status | Published - Mar 2016 |
Peer-reviewed | Yes |
External IDs
PubMed | 26987899 |
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Scopus | 84961659964 |
Keywords
Keywords
- Single-crystal growth, Magnetic-properties, Phase-transitions, Fermi-surface, Ce, Spectroscopies, Cerium, Heat