Strain controlled valley filtering in multi-terminal graphene structures

Autor:	Milovanovic, S. P., Peeters, F. M.
Rok vydání:	2016
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
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
Externí odkaz:	http://arxiv.org/abs/1610.09916 Zobrazit plný text záznamu View this record from Arxiv