Abstract
The Goos-Hänchen (GH) effect is an interference effect on total internal reflection at an interface, resulting in a shift of the reflected beam along the interface. We show that the GH effect at a interface in graphene depends on the pseudospin (sublattice) degree of freedom of the massless Dirac fermions, and find a sign change of at angle of incidence determined by the critical angle for total reflection. In an -doped channel with -doped boundaries the GH effect doubles the degeneracy of the lowest propagating mode, introducing a twofold degeneracy on top of the usual spin and valley degeneracies. This can be observed as a stepwise increase by of the conductance with increasing channel width.
- Received 31 December 2008
DOI:https://doi.org/10.1103/PhysRevLett.102.146804
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