We consider electron waveguides (quantum wires) in graphene created by suitable inhomogeneous magnetic fields. The properties of uni-directional snake states are discussed. For a certain magnetic field profile, two spatially separated counter-propagating snake states are formed, leading to conductance quantization insensitive to backscattering by impurities or irregularities of the magnetic field.
@article{arxiv.0708.1876,
title = {Conductance quantization and snake states in graphene magnetic waveguides},
author = {T. K. Ghosh and A. De Martino and W. Häusler and L. Dell'Anna and R. Egger},
journal= {arXiv preprint arXiv:0708.1876},
year = {2008}
}
Comments
5 pages, 4 figures, final version accepted as Rapid Comm. in PRB