title: Stiffness of single-walled carbon nanotubes under large strain
abstract: Large-scale molecular dynamic simulations of the axial deformations in single-walled carbon nanotubes have been performed using an O(N) tight-binding method. Our simulations indicate that under large strain, 0 K stress is remarkably sensitive to helicity, and that a zigzag nanotube and an armchair nanotube are the stiffest, respectively, under elongation and compression regimes. Furthermore, the elastic properties of a graphite sheet have been investigated using a simple harmonic potential and an analytic bond-order potential. The results suggest that the unique elastic properties of carbon nanotubes originate from those of a six-membered ring.
authors.affiliation: Japan Advanced Institute of Science and Technology, Tatsunokuchi Ishikawa 923-1292, Japan.
authors.initials: T
authors.lastname: Ozaki
authors.initials: Y
authors.lastname: Iwasa
authors.initials: T
authors.lastname: Mitani