2026-06-28T09:43:04Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/498542024-07-09T15:40:59Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Carpio Rodríguez, Ana María
author
Bonilla, Luis L.
2023-06-20T09:32:32Z
2023-06-20T09:32:32Z
2008
Carpio Rodríguez, A. M. y Bonilla, L. L. «Periodized Discrete Elasticity Models for Defects in Graphene». Physical Review B, vol. 78, n.o 8, agosto de 2008, p. 085406. DOI.org (Crossref), https://doi.org/10.1103/PhysRevB.78.085406.
1098-0121
10.1103/PhysRevB.78.085406
https://hdl.handle.net/20.500.14352/49854
https://doi.org/10.1103/PhysRevB.78.085406
http://arxiv.org/pdf/0805.1220.pdf
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.
eng
Periodized discrete elasticity models for defects in graphene
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