Directional Control of Charge and Valley Currents in a Graphene-Based Device

02 November 2018, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


We propose a directional switching effect in a metallic device. To such end we exploit a graphene-based device with a three-terminal geometry in the presence of a magnetic field. We show that unidirectional charge and valley currents can be controlled by the Fermi energy and the magnetic field direction in the active device. Interestingly, unidirectional transport of charge and valley is generated between two-terminals at the same bias voltage. Furthermore, we quantify the valley depolarization as a function of disorder concentration. Our results open a way for active graphene-based valleytronics devices.


one way transport of charge and valley
valley polarization


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