Interferometry of Klein tunnelling electrons in graphene quantum rings

Abstract

We theoretically study a current switch that exploits the phase acquired by a charge carrier as it tunnels through a potential barrier in graphene. The system acts as an interferometer based on an armchair graphene quantum ring, where the phase difference between interfering electronic wave functions for each path can be controlled by tuning either the height or the width of a potential barrier in the ring arms. By varying the parameters of the potential barriers the interference can become completely destructive. We demonstrate how this interference effect can be used for developing a simple graphene-based logic gate with high on/off ratio

arXiv comment6 pages, 6 figures

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Cited by in corpus (5)

• Oblique Klein tunneling in 8-Pmmn borophene p-n junctions
• Lattice thermal conductivity of graphene nanostructures
• Effect of magnetic field on the electronic properties of an $\alpha$-$T_3$ ring
• Perfect transmission at oblique incidence by trigonal warping in graphene P-N junctions
• Electronic properties of bilayer graphene with magnetic quantum structures studied using the Dirac equation