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Dynamical polarizability of graphene beyond the Dirac cone approximation

Stauber, Tobias, Schliemann, John and Peres, N. M. R. (2010) Dynamical polarizability of graphene beyond the Dirac cone approximation. Phys. Rev. B 81, 085409.

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Date of publication of this fulltext: 11 May 2012 09:49

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Other URL: http://link.aps.org/doi/10.1103/PhysRevB.81.085409


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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Item type:Article
Date:4 February 2010
Institutions:Physics > Institute of Theroretical Physics > Chair Professor Grifoni > Group John Schliemann
Projects:GRK 1570, Elektronische Eigenschaften von Nanostrukturen auf Kohlenstoff-Basis
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Dewey Decimal Classification:500 Science > 530 Physics
Refereed:Yes, this version has been refereed
Created at the University of Regensburg:Yes
Item ID:24301
Owner only: item control page


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