Strain controlled valley filtering in multi-terminal graphene structures
Autor: | Milovanovic, S. P., Peeters, F. M. |
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Rok vydání: | 2016 |
Předmět: | |
Zdroj: | Appl. Phys. Lett. 109, 203108 (2016) |
Druh dokumentu: | Working Paper |
DOI: | 10.1063/1.4967977 |
Popis: | 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. Comment: 4 pages, 4 figures |
Databáze: | arXiv |
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