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Descripción: The cores of edge dislocations, edge dislocation dipoles, and edge dislocation loops in planar graphene have been studied by means of periodized discrete elasticity models. To build these models, we have found a way to discretize linear elasticity on a planar hexagonal lattice using combinations of difference operators that do not symmetrically involve all the neighbors of an atom. At zero temperature, dynamically stable cores of edge dislocations may be heptagon-pentagon pairs (glide dislocations) or octagons (shuffle dislocations) depending on the choice of initial configuration. Possible cores of edge dislocation dipoles are vacancies, pentagon-octagon-pentagon divacancies, Stone-Wales defects, and 7-5-5-7 defects. While symmetric vacancies, divacancies, and 7-5-5-7 defects are dynamically stable, asymmetric vacancies and 5-7-7-5 Stone-Wales defects seem to be unstable.
Autor(es): Carpio Rodríguez, Ana María - Bonilla , L.L. -
Id.: 55211135
Idioma:
eng
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Versión: 1.0
Estado: Final
Tipo: application/pdf -
Palabras clave: Física del estado sólido -
Tipo de recurso:
Artículo
- PeerReviewed
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Tipo de Interactividad: Expositivo
Nivel de Interactividad: muy bajo
Audiencia:
Estudiante
- Profesor
- Autor
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Estructura: Atomic
Coste: no
Copyright: sí
: info:eu-repo/semantics/embargoedAccess
Formatos: application/pdf -
Requerimientos técnicos: Browser: Any -
Relación:
[References] http://arxiv.org/pdf/0805.1220.pdf
[References] http://eprints.ucm.es/14933/
Fecha de contribución: 21-abr-2012
Contacto:
Localización:
