All-strain based valley filter in graphene nanoribbons using snake states

L. S. Cavalcante, A. Chaves, D. R. Da Costa, G. A. Farias, F. M. Peeters

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

A pseudomagnetic field kink can be realized along a graphene nanoribbon using strain engineering. Electron transport along this kink is governed by snake states that are characterized by a single propagation direction. Those pseudomagnetic fields point towards opposite directions in the K and K′ valleys, leading to valley polarized snake states. In a graphene nanoribbon with armchair edges this effect results in a valley filter that is based only on strain engineering. We discuss how to maximize this valley filtering by adjusting the parameters that define the stress distribution along the graphene ribbon.

Original languageEnglish (US)
Article number075432
JournalPhysical Review B
Volume94
Issue number7
DOIs
StatePublished - Aug 23 2016

Bibliographical note

Funding Information:
This work was supported by the Brazilian Council for Research (CNPq), under the PRONEX/FUNCAP and Science Without Borders (SWB) programs, CAPES, the Lemann Foundation, and the Flemish Science Foundation (FWO-Vl).

Publisher Copyright:
© 2016 American Physical Society.

Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.

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