Electronic Transport in Graphene with Aggregated Hydrogen Adatoms

Hydrogen adatoms and other species covalently bound to graphene act as resonant scattering centers affecting the electronic transport properties and inducing Anderson localization. We show that attractive interactions between adatoms on graphene and their diffusion mobility strongly modify the spati...

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Bibliographic Details
Published in:arXiv.org 2014-08
Main Authors: Gargiulo, Fernando, Autès, Gabriel, Virk, Naunidh, Barthel, Stefan, Rösner, Malte, Toller, Lisa R M, Wehling, Tim O, Yazyev, Oleg V
Format: Article
Language:English
Subjects:
Adatoms
Anderson localization
Electron transport
Graphene
Hydrogen
Localization
Resistance
Spatial distribution
Transport properties
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Summary:Hydrogen adatoms and other species covalently bound to graphene act as resonant scattering centers affecting the electronic transport properties and inducing Anderson localization. We show that attractive interactions between adatoms on graphene and their diffusion mobility strongly modify the spatial distribution, thus fully eliminating isolated adatoms and increasing the population of larger size adatom aggregates. Our scaling analysis shows that such aggregation of adatoms increases conductance by up to several orders of magnitude and results in significant extension of the Anderson localization length in the strong localization regime. We introduce a simple definition of the effective adatom concentration \(x^\star\) , which describes the transport properties of both random and correlated distributions of hydrogen adatoms on graphene across a broad range of concentrations.
ISSN:2331-8422
DOI:10.48550/arxiv.1408.0245