Granular Graphene: direct observation of zigzag and armchair edge waves
Applied Physics
2019-06-05 v2 Mesoscale and Nanoscale Physics
Materials Science
Abstract
We propose a mechanical granular graphene obtained by replacing the carbon atoms with macroscopic spherical stainless steel beads in contact. The experimental measured dispersion relation is presented, in conjunction with evidence of the Dirac points. In addition, wave propagation along the zigzag and a robust turning effect of edge waves from the zigzag to the armchair boundary is experimentally revealed, even in the absence of a full band gap for bulk modes. Our work shows that mechanical granular graphene can serve as an excellent experimental platform to study novel Dirac, topological and nonlinear wave phenomena.
Keywords
Cite
@article{arxiv.1812.04763,
title = {Granular Graphene: direct observation of zigzag and armchair edge waves},
author = {Li-Yang Zheng and Florian Allein and Vincent Tournat and Vitalyi Gusev and Georgios Theocharis},
journal= {arXiv preprint arXiv:1812.04763},
year = {2019}
}