Complutense University Library

Periodized discrete elasticity models for defects in graphene

Carpio Rodríguez, Ana María and Bonilla , L.L. (2008) Periodized discrete elasticity models for defects in graphene. Physical review B, 78 (8). ISSN 1098-0121

[img] PDF
Restricted to Repository staff only until 2020.

424kB

Official URL: http://arxiv.org/pdf/0805.1220.pdf

View download statistics for this eprint

==>>> Export to other formats

Abstract

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.

Item Type:Article
Uncontrolled Keywords:Carbon nanotubes; Graphite; Dislocations; Crystals
Subjects:Sciences > Physics > Solid state physics
ID Code:14933
References:

1 K.S. Novoselov, A. K. Geim, S. V. Morozov, D. Jiang, Y. Zhang, S. V. Dubonos, I. V. Grigorieva and A. A. Firsov, Science 306, 666 (2004).

2 J.C. Meyer, A.K. Geim, M.I. Katsnelson, K.S. Novoselov, T.J. Booth and S. Roth, Nature 446, 60 (2007).

3 K.S. Novoselov, D. Jiang, F. Schedin, T.J. Booth, V. V. Khotkevich, S. V. Morozov and A. K. Geim, Proc. Natl. Acad. Sci. USA 102, 10451 (2005).

4 A.K. Geim and K.S. Novoselov, Nature Materials 6, 183(2007).

5 Y. Ma, P.O. Lehtinen, A.S. Foster, R.M. Nieminen, New J. Phys. 6, 68 (2004).

6 N.M.R. Peres, F. Guinea and A.H. Castro-Neto, Phys. Rev. B 73, 125411 (2006); N. M. R. Peres, F. D. Klironomos, S.-W. Tsai, J. R. Santos, J. M. B. Lopes dos Santos and A. H. Castro Neto, Europhys. Lett.80, 67007 (2007).

7 A. H. Castro Neto, F. Guinea, N. M. R. Peres, K. S. Novoselov and A. K. Geim, arXiv:0709.1163, to appear in Rev. Mod. Phys.

8 A. Cortijo and M.A.H. Vozmediano, Nucl. Phys. B 763, 293 (2007).

9 A. Hashimoto, K. Suenaga, A. Gloter, K. Urita, Nature 430, 870 (2004).

10 J. Coraux, A. T. N’Diaye, C. Busse and T. Michely, Nano Lett. 8, 565 (2008).

11 C.P. Ewels, M.I. Heggie and P.R. Briddon, Chem. Phys. Lett. 351, 178 (2002).

Deposited On:20 Apr 2012 11:31
Last Modified:06 Feb 2014 10:12

Repository Staff Only: item control page