ausblenden:
Schlagwörter:
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Zusammenfassung:
We employ a combination of chemical substitution and angle resolved
photoemission spectroscopy to prove that the Fermi level in the gamma
band of Sr2-gamma La gamma RuO4 can be made to traverse a van Hove
singularity. Remarkably, the large mass renormalization has little
dependence on either k or doping. By combining the results from
photoemission with thermodynamic measurements on the same batches of
crystals, we deduce a parametrization of the full many-body
quasiparticle dispersion in Sr2RuO4 which extends from the Fermi level
to approximately 20 meV above it.
