Resonant angle-resolved photoemission spectroscopy has been performed on a heavy fermion material CeRu2Si2 at the 4d-4f core threshold. The angle-resolved photoemission spectra display a sharp peak at EF which shows a remarkable intensity variation as a function of momentum, suggesting an energy dispersion of the Kondo resonance state above EF. On increasing temperature, the peak intensity is rapidly suppressed, while it persists up to a temperature much higher than the Kondo temperature.
|Number of pages
|Physica B: Condensed Matter
|Published - 2002 Mar
|International Conference on Strongly Correlated Electrons - Ann Arbor, MI, United States
Duration: 2002 Aug 6 → 2002 Aug 6
- Heavy fermion