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Título:
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Localisation and finite-size effects in graphene flakes
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Autores:
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Gonzalez-Santander, C. ;
Domínguez-Adame Acosta, Francisco ;
Hilke, M. ;
Roemer, R. A.
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Tipo de documento:
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texto impreso
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Editorial:
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EPL Association, European Physical Society, 2013-10
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/restrictedAccess
info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física de materiales
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Tipo = Artículo
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Resumen:
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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.
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En línea:
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https://eprints.ucm.es/id/eprint/27395/1/Dguez-Adame04.pdf
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