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 language | English (US) |
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Article number | 075432 |
Journal | Physical Review B |
Volume | 94 |
Issue number | 7 |
DOIs | |
State | Published - Aug 23 2016 |
Externally published | Yes |
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.