Optical conductivity of graphene in the visible region of the spectrum
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TLDR
In this paper, the optical conductivity of graphene has been computed beyond the usual Dirac-cone approximation, giving results that are valid in the visible region of the conductivity spectrum.Abstract:
We compute the optical conductivity of graphene beyond the usual Dirac-cone approximation, giving results that are valid in the visible region of the conductivity spectrum. The effect of next-nearest-neighbor hopping is also discussed. Using the full expression for the optical conductivity, the transmission and reflection coefficients are given. We find that even in the optical regime the corrections to the Dirac-cone approximation are surprisingly small a few percent. Our results help in the interpretation of the experimental results reported by Nair et al. Science 320, 1308 2008.read more
Citations
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Fluorographene: A Two‐Dimensional Counterpart of Teflon
Rahul R. Nair,Wencai Ren,Rashid Jalil,Ibtsam Riaz,Vasyl G. Kravets,L. Britnell,Peter Blake,Fredrik Schedin,A. S. Mayorov,Shengjun Yuan,Mikhail I. Katsnelson,Hui-Ming Cheng,Wlodek Strupinski,Lyubov G. Bulusheva,Alexander V. Okotrub,Irina V. Grigorieva,Alexander N. Grigorenko,Kostya S. Novoselov,Andre K. Geim +18 more
TL;DR: F fluorographene is a high-quality insulator that inherits the mechanical strength of graphene, exhibiting a Young's modulus of 100 N m(-1) and sustaining strains of 15%.
References
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Optical and magneto-optical far-infrared properties of bilayer graphene
David Abergel,Vladimir I. Fal'ko +1 more
TL;DR: In this paper, the authors analyzed the spectroscopic features of bilayer graphene determined by the formation of pairs of low-energy and split bands in this material and showed that the inter-Landau-level absorption spectrum in bilayer GPs at high magnetic field is much denser in the far-infrared range than that in monolayer material and that the polarization dependence of its lowest energy peak can be used to test the form of the bilayer ground state in the quantum Hall-effect regime.