FisMat2017 - Submission - View

Abstract's title: Propagating edge states in strained honeycomb lattices
Submitting author: Grazia Salerno
Affiliation: INO-CNR BEC Center Trento
Affiliation Address: via Sommarive 14 38123 Trento, Italy
Country: Italy
Oral presentation/Poster (Author's request): Oral presentation
Other authors and affiliations: Tomoki Ozawa, Hannah M. Price and Iacopo Carusotto (INO-CNR BEC Center)

We investigate the helically-propagating edge states associated with pseudo-Landau levels in strained honeycomb lattices. We exploit chiral symmetry to derive a general criterion for the ex- istence of these propagating edge states in the presence of only nearest-neighbour hoppings and we verify our criterion using numerical simulations of both uni-axially and trigonally strained hon- eycomb lattices. We show that the propagation of the helical edge state can be controlled by engineering the shape of the edges. Our result opens up an avenue toward the precise control of edge modes through manipulation of the edge shape.