Discontinuous evolution of the structure of stretching polycrystalline graphene
arXiv:1906.04187 · doi:10.1103/PhysRevB.100.161402
Abstract
Polycrystalline graphene has an inherent tendency to buckle, i.e. develop out-of-plane, three-dimensional structure. A force applied to stretch a piece of polycrystalline graphene influences the out-of-plane structure. Even if the graphene is well-relaxed, this happens in non-linear fashion: occasionally, a tiny increase in stretching force induces a significant displacement, in close analogy to avalanches, which in turn can create vibrations in the surrounding medium. We establish this effect in computer simulations: by continuously changing the strain, we follow the displacements of the carbon atoms that turn out to exhibit a discontinuous evolution. Furthermore, the displacements exhibit a hysteretic behavior upon the change from low to high stress and back. These behaviors open up a new direction in studying dynamical elasticity of polycrystalline quasi-two-dimensional systems, and in particular the implications on their mechanical and thermal properties.
arXiv commentAccepted for publication as PRB Rapid Communication
References in corpus (18)
- The electronic properties of graphene
- Graphene: Status and Prospects
- Van der Waals heterostructures
- Magic-angle graphene superlattices: a new platform for unconventional superconductivity
- Correlated Insulator Behaviour at Half-Filling in Magic Angle Graphene Superlattices
- Unimpeded permeation of water through helium-leak-tight graphene-based membranes
- Tuning superconductivity in twisted bilayer graphene
- Intrinsic ripples in graphene
- Electromechanical Piezoresistive Sensing in Suspended Graphene Membranes
- High-quality continuous random networks
- Graphene Squeeze-Film Pressure Sensors
- Structure of twisted and buckled bilayer graphene
- Contrasting Elastic Properties of Heavily B- and N-doped Graphene, with Random Distributions Including Aggregates
- Semiflexible Filamentous Composites
- Colorimetry technique for scalable characterization of suspended graphene
- Strong long-range relaxations of structural defects in graphene simulated using a new semi-empirical potential
- Probing the Shape of a Graphene Nanobubble
- Probing crystallinity of graphene samples via the vibrational density of states