Young's modulus of Graphene: a molecular dynamics study
arXiv:0906.5237 · doi:10.1103/PhysRevB.80.113405
Abstract
The Young's modulus of graphene is investigated through the intrinsic thermal vibration in graphene which is `observed' by molecular dynamics, and the results agree quite well with the recent experiment [Science \textbf{321}, 385 (2008)]. This method is further applied to show that the Young's modulus of graphene: 1. increases with increasing size and saturation is reached after a threshold value of the size; 2. increases from 0.95 TPa to 1.1 TPa as temperature increases in the region [100, 500]K; 3. is insensitive to the isotopic disorder in the low disorder region (), and decreases gradually after further increasing the disorder percentage.
accepted by PRB, brief report, discussion on Poisson ratio added