Abstract
Abstract
We explore the influence of strain on the valley-polarized transmission of graphene by employing the wave-function matching and the non-equilibrium Green’s function technique. When the transmission is along the armchair direction, we show that the valley polarization and transmission can be improved by increasing the width of the strained region and increasing (decreasing) the extensional strain in the armchair (zigzag) direction. It is noted that the shear strain does not affect transmission and valley polarization. Furthermore, when we consider the smooth strain barrier, the valley-polarized transmission can be enhanced by increasing the smoothness of the strain barrier. We hope that our finding can shed new light on constructing graphene-based valleytronic and quantum computing devices by solely employing strain.
Funder
China Scholarship Council
Natural Science Foundation of Jiangsu Province
Natural Science Foundation of Shandong Province
Qinglan Project of Jiangsu Province of China
Fonds Wetenschappelijk Onderzoek
National Natural Science Foundation of China
Subject
Condensed Matter Physics,General Materials Science
Cited by
5 articles.
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