2026-06-08T01:00:48Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/337012023-08-25T19:23:15Zcom_20.500.14352_14col_20.500.14352_15

Localisation and finite-size effects in graphene flakes González-Santander de la Cruz, Clara Domínguez-Adame Acosta, Francisco Hilke, M. Roemer, R. A. 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. 2023-06-19T13:26:29Z 2023-06-19T13:26:29Z 2023-06-19T13:26:29Z 2013-10 journal article https://hdl.handle.net/20.500.14352/33701 0295-5075 10.1209/0295-5075/104/17012 eng (MAT2010-17180) restricted access EPL Association, European Physical Society