Space-time dispersion of graphene conductivity

L. A. Falkovsky and A. A. Varlamov ()

The European Physical Journal B: Condensed Matter and Complex Systems, 2007, vol. 56, issue 4, 281-284

Abstract: We present an analytic calculation of the conductivity of pure graphene as a function of frequency ω, wave-vector k, and temperature for the range where the energies related to all these parameters are small in comparison with the band parameter γ≃3 eV, but much larger than the collision rate τ -1 . The simple asymptotic expressions are given in various limiting cases. For instance, the conductivity for kv 0 ≪ T≪ω is equal to σ(ω,k)=e 2 /4ħ and independent of the band structure parameters γ and v 0 . Our results are also used to explain the known dependence of the graphite conductivity on temperature and pressure. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007

Keywords: 81.05.Uw Carbon; diamond; graphite; 78.67.Ch Nanotubes; 78.67.-n Optical properties of low-dimensional; mesoscopic; and nanoscale materials and structures (search for similar items in EconPapers)
Date: 2007
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DOI: 10.1140/epjb/e2007-00142-3

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