Corner states in second-order mechanical topological insulator
Mesoscale and Nanoscale Physics
2020-09-09 v1
Abstract
We numerically and experimentally study corner states in a continuous elastic plate with em-bedded bolts in a hexagonal pattern. While preserving C6 crystalline symmetry, the system can transition from a topologically trivial to a non-trivial configuration. We create interfacial corners of 60{\deg} and 120{\deg} by adjoining trivial and non-trivial topological configurations. Due to the rich interaction between the bolts and the continuous elastic plate, we find a variety of corner states with and without topological origin. Notably, some of the corner states are highly localized and tunable. By taking advantage of this property, we experimentally demonstrate one-way corner localization in a Z-shaped domain wall.
Cite
@article{arxiv.2009.03525,
title = {Corner states in second-order mechanical topological insulator},
author = {Chun-Wei Chen and Rajesh Chaunsali and Johan Christensen and Georgios Theocharis and Jinkyu Yang},
journal= {arXiv preprint arXiv:2009.03525},
year = {2020}
}
Comments
6 pages, 5 figures