On the universal ac optical background in graphene

By Valery P. Gusynin, S. Sharapov, J. P. Carbotte. 2009

217 citations recorded by the source corpus.

Latest experiments have confirmed the theoretically expected universal value πe2/2h of the ac conductivity of graphene and have revealed departures of the quasi-particle dynamics from predictions for the Dirac fermions in idealized graphene. We present analytical expressions for the ac conductivity in graphene that allow one to study how it is affected by interactions, temperature, external magnetic field and the opening of a gap in the quasi-particle spectrum. We show that the ac conductivity of graphene does not necessarily give a metrologically accurate value of the von Klitzing constant h/e2, because it is depleted by the electron–phonon interaction. In a weak magnetic field, the ac conductivity oscillates around the universal value and the Drude peak evolves into a peak at the cyclotron frequency.

Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/3a2fc8e3565ab984fd13ad4ce0480365a638ee46

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In Atomic and Molecular Physics, and Optics

In Materials Chemistry

Citations in the corpus

Integral Equation Analysis of Plane Wave Scattering by Coplanar Graphene-Strip Gratings in the THz Range (2013, unknown): “They are characterized with complex-valued graphene conductivity ( , , , ) c T σ ω μ Γ calculated via Kubo’s formalism [16, 25] (see Appendix), where ω is the radian frequency, c μ is the chemical potential,”
Electronic transport in two-dimensional graphene (2010, background): “ange ˙(!) from the universal value, although, a consensus is yet to emerge on whether these eects could be observed experimentally or how accurate ˙(!) is for a measure of the ne structure constant (Gusynin et al., 2009; Mak et al., 2008). 2. Graphene nanoribbons It was realized in the very rst grap”
Colloquium: The transport properties of graphene: An introduction (2010, background): “The transmittance is calculated from the solution of Fresnel’s equations, reading (Abergel et al., 2007; Blake et al., 2007; Pedersen, 2003; Stauber et al., 2008b) T = |1 + σ(ω)/(2c 0)|−2 , (48) where σ(ω) is the the optical conductivity (Falkovsky and Pershoguba, 2007; Falkovsky and Varlamov, 2007;”
Sinusoidally Modulated Graphene Leaky-Wave Antenna for Electronic Beamscanning at THz (2013, methodology): “Its surface conductivity can be modeled using the well-known Kubo formalism [21].”