Strain induced correlation gaps in carbon nanotubes

Abstract

We calculate the change in the correlation gap of armchair carbon nanotubes with uniaxial elastic strain. We predict that such a stretching will enlarge the correlation gap for all carbon nanotubes by a change that could be as large as several meV per percent of applied strain, in contrast with pure band structure calculations where no change for armchair carbon nanotubes is predicted. The correlation effects are considered within a self-consistent Hartree-Fock approximation to the Hubbard model with on-site repulsion only.

4 pages, 4 figures

References in corpus (7)

• Size, Shape and Low Energy Electronic Structure of Carbon Nanotubes
• Tuning carbon nanotube bandgaps with strain
• Conductance of Distorted Carbon Nanotubes
• Electrical and Mechanical Properties of Twisted Carbon Nanotubes
• Electronic transport through carbon nanotubes -- effects of structural deformation and tube chirality
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• Integer Quantum Hall Effect of Interacting Electrons in Graphene