Orientational Melting in Carbon Nanotube Ropes

Details Orientational Melting in Carbon Nanotube Ropes Orientational Melting in Carbon Nanotube Ropes

1999-10-13

arxiv.org/abs/cond-mat/9910203v1

Phys. Rev. Lett. <B>84</B>, 1483 (2000).

Physics

Condensed Matter

Materials Science

4 page LaTeX file with 3 figures (10 PostScript files)

Scientific paper

10.1103/PhysRevLett.84.1483

Using Monte Carlo simulations, we investigate the possibility of an orientational melting transition within a "rope" of (10,10) carbon nanotubes. When twisting nanotubes bundle up during the synthesis, orientational dislocations or twistons arise from the competition between the anisotropic inter-tube interactions, which tend to align neighboring tubes, and the torsion rigidity that tends to keep individual tubes straight. We map the energetics of a rope containing twistons onto a lattice gas model and find that the onset of a free "diffusion" of twistons, corresponding to orientational melting, occurs at T_OM > 160 K.

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