%0 Journal Article
%A González-Santander de la Cruz, Clara
%A Domínguez-Adame Acosta, Francisco
%A Hilke, M.
%A Roemer, R. A.
%T Localisation and finite-size effects in graphene flakes
%D 2013
%@ 0295-5075
%U https://hdl.handle.net/20.500.14352/33701
%X We show that electron states in disordered graphene, with an onsite potential that induces inter-valley scattering, are localised for all energies at disorder as small as 1/6 of the band width of clean graphene. We clarify that, in order for this Anderson-type localisation to be manifested, graphene flakes of size approximate to 200 x 200 nm(2) or larger are needed. For smaller samples, due to the surprisingly large extent of the electronic wave functions, a regime of apparently extended (or even critical) states is identified. Our results complement earlier studies of macroscopically large samples and can explain the divergence of results for finite-size graphene flakes.
%~