The dislocations in graphene with the correction from lattice effect |
| |
Authors: | H-L Zhang S-F Wang R Wang and J Jiao |
| |
Institution: | 1.Institute for structure and function, Chongqing University,Chongqing,P.R. China |
| |
Abstract: | The dislocation widths and Peierls stresses of glide dislocations and shuffle dislocations in graphene have been studied by
the improved Peierls-Nabarro (P-N) equation which contains the discrete correction. The discrete parameter is obtained from
a simple dynamic model in which the
interaction attributed to the variation of bond length and angle was considered. The restoring force in the improved P-N equation
is given by the gradient of the generalized stacking fault energy
surface (γ-surface). Our calculation shows that the widths of the shuffle dislocation and the glide dislocation are narrow
and the width of the shuffle dislocation is about twice wider than the glide dislocation. The Peierls stress of a shuffle
dislocation is one order of magnitude smaller than that of a glide dislocation. As a consequence, the shuffle dislocation
moves more easily than the glide dislocation. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |