Semi-massless fermions tunneling through a gate barrier in graphene

Details Semi-massless fermions tunneling through a gate barrier in graphene Semi-massless fermions tunneling through a gate barrier in graphene

2010-09-26

arxiv.org/abs/1009.5060v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pages,3 figures

Scientific paper

In the case of the strongly deformed graphene, gapless graphene may turn to gapped graphene at the critical deformation. We find that, like semi-massless fermions, electrons in the deformed graphene, at the critical point, mimic the dispersions of the massless fermions in one direction and the massive fermions in the other. Our predicted dispersion formula is the generalization of the previously predicted formula. The behavior of the particle-like semi-massless fermions tunneling through a gate barrier is contrasted with that of the (pure) massless fermions tunneling through a gate barrier in the original graphene. This is due to the effect of the combination between the massless and the massive particle dispersions at the critical deformation.

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