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González-Santander de la Cruz, Clara and Domínguez-Adame Acosta, Francisco and Hilke, M. and Roemer, R. A. (2013) Localisation and finite-size effects in graphene flakes. EPL, 1047 (1). ISSN 0295-5075
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Official URL: http://dx.doi.org/10.1209/0295-5075/104/17012
Abstract
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.
Item Type: | Article |
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Additional Information: | © EPLA, 2013. |
Uncontrolled Keywords: | Metal-Insulator-Transition, Anderson Transition, Disordered-Systems, Coherent Transport, Electronic States, Scaling Theory, Absence, Dependence, Diffusion, Length |
Subjects: | Sciences > Physics > Materials |
ID Code: | 27395 |
Deposited On: | 21 Nov 2014 13:03 |
Last Modified: | 03 Nov 2021 18:12 |
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