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Wavepacket scattering on graphene edges in the presence of a (pseudo) magnetic field

The scattering of a Gaussian wavepacket in armchair and zigzag graphene edges is theoretically investigated by numerically solving the time dependent Schrödinger equation for the tight-binding model Hamiltonian. Our theory allows to investigate scattering in reciprocal space, and depending on the type of graphene edge we observe scattering within the same valley, or between different valleys. In the presence of an external magnetic field, the well know skipping orbits are observed. However, our results demonstrate that in the case of a pseudo-magnetic field, induced by non-uniform strain, the scattering by an armchair edge results in a non-propagating edge state.

preprint2012arXivOpen access
D. R. da CostaA. ChavesG. A. FariasL. CovaciF. M. Peeters
cond-mat.mes-hallcond-mat.mtrl-sci
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D. R. da CostaA. ChavesG. A. FariasL. CovaciF. M. Peeters

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