Journal
PHYSICAL REVIEW B
Volume 61, Issue 11, Pages 7308-7311Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.61.7308
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We discuss low-energy electronic properties of distorted graphene sheets from a local geometric viewpoint, treating curvature and strain as perturbations of a smooth surface. This allows a unified description of the variety of deformations to which carbon nanotubes are susceptible. By using a general symmetry analysis in conjunction with a four-orbital, nonorthogonal tight-binding model, we calculate accurate values of the relevant couplings.
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