title: Damaging graphene with ozone treatment: a chemically tunable metal-insulator transition.
abstract: We present a multiscale ab initio study of electronic and transport properties of two-dimensional graphene after epoxide functionalization via ozone treatment. The orbital rehybridization induced by the epoxide groups triggers a strong intervalley scattering and changes dramatically the conduction properties of graphene. By varying the coverage density of epoxide defects from 0.1 to 4%, charge conduction can be tuned from a diffusive to a strongly localized regime, with localization lengths down to a few nanometers long. Experimental results supporting the interpretation as a metal-insulator transition are also provided.
authors.affiliation: IMCN, Universite Catholique de Louvain, Place Croix du Sud 1 (PCPM-ETSF), B-1348 Louvain-la-Neuve, Belgium.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Leconte
authors.forename: Joël
authors.initials: J
authors.lastname: Moser
authors.forename: Pablo
authors.initials: P
authors.lastname: Ordejón
authors.forename: Haihua
authors.initials: H
authors.lastname: Tao
authors.forename: Aurélien
authors.initials: A
authors.lastname: Lherbier
authors.forename: Adrian
authors.initials: A
authors.lastname: Bachtold
authors.forename: Francesc
authors.initials: F
authors.lastname: Alsina
authors.forename: Clivia M
authors.initials: CM
authors.lastname: Sotomayor Torres
authors.forename: Jean-Christophe
authors.initials: JC
authors.lastname: Charlier
authors.forename: Stephan
authors.initials: S
authors.lastname: Roche