Enhanced Screening in Chemically Functionalized Graphene

Abstract

Resonant scatterers such as hydrogen adatoms can strongly enhance the low energy density of states in graphene. Here, we study the impact of these impurities on the electronic screening. We find a two-faced behavior: Kubo formula calculations reveal an increased dielectric function $\epsilon$ upon creation of midgap states but no metallic divergence of the static $\epsilon$ at small momentum transfer $q\to 0$. This bad metal behavior manifests also in the dynamic polarization function and can be directly measured by means of electron energy loss spectroscopy. A new length scale $l_c$ beyond which screening is suppressed emerges, which we identify with the Anderson localization length.

5 pages, 4 figures

References in corpus (21)

• Control of graphene's properties by reversible hydrogenation
• Electronic transport in two dimensional graphene
• Anderson Transitions
• Electronic Properties of Disordered Two-Dimensional Carbon
• Fluorographene: Two Dimensional Counterpart of Teflon
• Dynamical polarization of graphene at finite doping
• The missing atom as a source of carbon magnetism
• Dirac cones reshaped by interaction effects in suspended graphene
• Disorder Induced Localized States in Graphene
• Non-Fermi liquid behaviour of electrons in the half-filled honeycomb lattice (A renormalization group approach)
• Modeling disorder in graphene
• Resonant scattering by realistic impurities in graphene
• Is graphene in vacuum an insulator?
• Modeling electronic structure and transport properties of graphene with resonant scattering centers
• Impurity States in Graphene
• A theoretical analysis of the chemical bonding and electronic structure of graphene interacting with Group IA and Group VIIA elements
• Two-dimensional Graphene with Structural Defects: Elastic Mean Free Path, Minimum Conductivity and Anderson Transition
• Excitation spectrum and high energy plasmons in single- and multi-layer graphene
• Diffusion and criticality in undoped graphene with resonant scatterers
• Localization and One-Parameter Scaling in Hydrogenated Graphene
• Impurity assisted nanoscale localization of plasmonic excitations in graphene

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• Electronic Properties of Disordered Graphene Antidot Lattices
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