Giant tunable magnetoresistance of electrically gated graphene ribbon with lateral interface under magnetic field

A. M. Kadigrobov

doi:10.1063/1.4974191

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arXiv · 1609.06648

Giant tunable magnetoresistance of electrically gated graphene ribbon with lateral interface under magnetic field

A. M. Kadigrobov

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Abstract

Quantum dynamics and kinetics of electrically gated graphene ribbons with lateral n-p and e-n-p junctions under magnetic field are investigated. It is shown that the snake-like states of quasiparticles skipping along the n-p interface do not manifest themselve in the main semiclassical part of the ribbon conductance. Giant oscillations of the conductance of a ribbon with an n-p-n junction are predicted and analytically calculated. Depending on the number of junctions inside the ribbon its magnetoresistance may be controllably changed by 50% - 90% by an extremely small change of the magnetic field or the gate voltage.

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A. M. Kadigrobov. 2016-09-21. Giant tunable magnetoresistance of electrically gated graphene ribbon with lateral interface under magnetic field. https://doi.org/10.1063/1.4974191

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