Thursday, January 10, 2013

1301.1943 (Francisco Correa et al.)

Finite-gap twists of carbon nanotubes and an emergent hidden

Francisco Correa, Vit Jakubsky
We consider radially twisted nanotubes in the low-energy approximation where the dynamics is governed by a one-dimensional Dirac equation. The mechanical deformation of the nanotubes is reflected by the presence of an effective vector potential. We discuss twisted carbon and boron-nitride nanotubes where deformations give rise to periodic and non-periodic finite-gap Hamiltonians. The intimate relation of these systems with the integrable AKNS hierarchy is exploited in the study of their spectral properties as well as in the computation of the (local) density of states. We show that a nonlinear hidden supersymmetry generated by local supercharges arises naturally in the finite-gap configurations of twisted nanotubes with time-reversal symmetry. The properties of the van Hove singularities are encoded in its structure.
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