Finitetemperature Casimir effect for graphene
Abstract
We adopt the Dirac model for quasiparticles in graphene and calculate the finitetemperature Casimir interaction between a suspended graphene layer and a parallel conducting surface. We find that at high temperature, the Casimir interaction in such system is just onehalf of that for two ideal conductors separated by the same distance. In this limit, a single graphene layer behaves exactly as a Drude metal. In particular, the contribution of the TE mode is suppressed, while the contribution of the TM mode saturates at the idealmetal value. The behavior of the Casimir interaction for intermediate temperatures and separations accessible in experiments is studied in some detail. We also find an interesting interplay between two fundamental constants of graphene physics: the finestructure constant and the Fermi velocity.
 Publication:

Physical Review B
 Pub Date:
 July 2011
 DOI:
 10.1103/PhysRevB.84.035446
 arXiv:
 arXiv:1102.1757
 Bibcode:
 2011PhRvB..84c5446F
 Keywords:

 12.20.Ds;
 73.22.f;
 Specific calculations;
 Electronic structure of nanoscale materials: clusters nanoparticles nanotubes and nanocrystals;
 High Energy Physics  Theory;
 Condensed Matter  Mesoscale and Nanoscale Physics;
 Quantum Physics
 EPrint:
 13 pages, 2 figures, to appear in Physical Review B