title: Electronic transport in graphene with aggregated hydrogen adatoms.
abstract: 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. Such spatial correlation is found to strongly influence the electronic transport properties of disordered graphene. 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*, which describes the transport properties of both random and correlated distributions of hydrogen adatoms on graphene across a broad range of concentrations.
authors.affiliation: Institute of Theoretical Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
authors.forename: Fernando
authors.initials: F
authors.lastname: Gargiulo
authors.affiliation: Institute of Theoretical Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
authors.forename: Gabriel
authors.initials: G
authors.lastname: Autès
authors.affiliation: Institute of Theoretical Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
authors.forename: Naunidh
authors.initials: N
authors.lastname: Virk
authors.affiliation: Institut für Theoretische Physik, Universität Bremen, Otto-Hahn-Allee 1, D-28359 Bremen, Germany and Bremen Center for Computational Materials Science, Am Fallturm 1a, D-28359 Bremen, Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Barthel
authors.affiliation: Institut für Theoretische Physik, Universität Bremen, Otto-Hahn-Allee 1, D-28359 Bremen, Germany and Bremen Center for Computational Materials Science, Am Fallturm 1a, D-28359 Bremen, Germany.
authors.forename: Malte
authors.initials: M
authors.lastname: Rösner
authors.affiliation: Institute of Theoretical Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
authors.forename: Lisa R M
authors.initials: LR
authors.lastname: Toller
authors.affiliation: Institut für Theoretische Physik, Universität Bremen, Otto-Hahn-Allee 1, D-28359 Bremen, Germany and Bremen Center for Computational Materials Science, Am Fallturm 1a, D-28359 Bremen, Germany.
authors.forename: Tim O
authors.initials: TO
authors.lastname: Wehling
authors.affiliation: Institute of Theoretical Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
authors.forename: Oleg V
authors.initials: OV
authors.lastname: Yazyev