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- URN zum Zitieren dieses Dokuments:
- urn:nbn:de:bvb:355-epub-243019
- DOI zum Zitieren dieses Dokuments:
- 10.5283/epub.24301
Zusammenfassung
We compute the dynamical polarizability of graphene beyond the usual Dirac cone approximation, integrating over the full Brillouin zone. We find deviations at ℏω=2t (where t is the hopping parameter) which amount to a logarithmic singularity due to the Van Hove singularity and derive an approximate analytical expression. Also at low energies, we find deviations from the results obtained from the ...
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