Strain controlled valley filtering in multi-terminal graphene structures

Abstract

Valley-polarized currents can be generated by local straining of multi-terminal graphene devices. The pseudo-magnetic field created by the deformation allows electrons from only one valley to transmit and a current of electrons from a single valley is generated at the opposite side of the locally strained region. We show that valley filtering is most effective with bumps of a certain height and width. Despite the fact that the highest contribution to the polarized current comes from electrons from the lowest sub-band, contributions of other sub-bands are not negligible and can significantly enhance the output current.

4 pages, 4 figures

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Cited by in corpus (6)

• Graphene Nanobubbles as Valley Filters and Beamsplitters
• Valleytronics in merging Dirac cones: All-electric-controlled valley filter, valve and universal reversible logic gate
• Tuning the pseudospin polarization of graphene by a pseudo-magnetic field
• Minimal Geometry for Valley Filtering in Graphene
• Probing valley filtering effect by Andreev reflection in zigzag graphene nanoribbon
• Graphene membrane as a pressure gauge