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7 - Optics and response functions

Published online by Cambridge University Press:  24 May 2020

Mikhail I. Katsnelson
Mikhail I. Katsnelson
Affiliation:
Radboud Universiteit Nijmegen
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Summary

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.

Keywords

Optical propertiesdensity matrixfine structure constantFermi liquid theoryplasmonsstatic screeningrandom phase approximationmagnetoopticsdiamagnetism
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The Physics of Graphene , pp. 168 - 192
Publisher: Cambridge University Press
Print publication year: 2020

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