Propagating edge states in strained honeycomb lattices

Anno: 2017

Autori: Salerno G., Ozawa T., Price HM., Carusotto I.

Affiliazione autori: Univ Trento, INO CNR BEC Ctr, I-38123 Povo, Italy; Univ Trento, Dipartimento Fis, I-38123 Povo, Italy

Abstract: 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 existence of these propagating edge states in the presence of only nearest-neighbor hoppings and we verify our criterion using numerical simulations of both uniaxially and trigonally strained honeycomb lattices. We show that the propagation of the helical edge state can be controlled by engineering the shape of the edges. Sensitivity to chiral-symmetry-breaking next-nearest-neighbor hoppings is assessed. Our result opens up an avenue toward the precise control of edge modes through manipulation of the edge shape.

Giornale/Rivista: PHYSICAL REVIEW B

Volume: 95 (24)      Da Pagina: 245418-1  A: 245418-12

DOI: 10.1103/PhysRevB.95.245418

Citazioni: 18
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-04-14
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