Acoustic and double elastic shock waves in single-crystal graphene
Abstract
Double elastic shock waves are rarely observed in two-dimensional (2D) materials and normally unexpected for elastically isotropic 2D crystals such as graphene. With large-scale molecular dynamics simulations, we show that in single-crystal graphene shock-loaded along nonzigzag and nonarmchair directions, double elastic shock waves (quasilongitudinal and quasitransverse) can emerge. Quantitative acoustic wave equation analysis reveals that shock-induced symmetry reduction in lattice, as well as in elastic stiffness tensor, gives rise to the normally unexpected quasitransverse wave following the quasilongitudinal wave.
- Publication:
-
Journal of Applied Physics
- Pub Date:
- February 2020
- DOI:
- 10.1063/1.5132925
- Bibcode:
- 2020JAP...127e5101L