Optics and response functions
Cambridge : Cambridge University Press
InKatsnelson, M.I. (ed.), The Physics of Graphene (Second Edition), pp. 168-192
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Theory of Condensed Matter
Katsnelson, M.I. (ed.), The Physics of Graphene (Second Edition)
SubjectTheory of Condensed Matter
Optical properties of massless Dirac electrons are considered. In particular, it is shown that they provide a universal, frequency-independent adsorption coefficient determined by fine structure constant. The possible effect of interelectron interaction on this property is discussed. Using a perturbation theory for density matrix, we derive Kubo formula for various response functions and use it to consider optics, magnetooptics, charge screening and diamagnetism of massless Dirac electrons. Graphene plasmonics is briefly reviewed.
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