Low Temperature Physics: 43, 133 (2017); https://doi.org/10.1063/1.4974191
Fizika Nizkikh Temperatur: Volume 43, Number 1 (January 2017), p. 160-171    ( to contents , go back )

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

A.M. Kadigrobov

Theoretische Physik III, Ruhr-Universität Bochum, D-44801 Bochum, Germany
E-mail: kadig@tp3.rub.de

Received July 29, 2016


Quantum dynamics and kinetics of electrically gated graphene ribbons with lateral n–p and n–p–n junctions under magnetic field are investigated. It is shown that the snake-like states [C.W.J. Beenakker, Rev. Mod. Phys. 80, 1337 (2008)] of quasiparticles skipping along the n–p interface do not manifest themselves in the main semi-classical 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 magneto-resistance may be controllably changed by 50–90% by an extremely small change of the magnetic field or the gate voltage.

PACS: 73.63.Bd Nanocrystalline materials;
PACS: 71.70.Di Landau levels;
PACS: 73.43.Cd Theory and modeling.

Key words: magnetoresistance, graphene ribbon, magnetic field.

Published online: November 25, 2016

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