Curvature, hybridization, and STM images of carbon nanotubes

Details Curvature, hybridization, and STM images of carbon nanotubes Curvature, hybridization, and STM images of carbon nanotubes

2001-04-30

arxiv.org/abs/cond-mat/0105002v1

Phys. Rev. B 64, 113402 (2001).

Physics

Condensed Matter

Strongly Correlated Electrons

Four pages in revtex format including four epsfig-embedded figures. The latest version in PDF format is available from http:

Scientific paper

10.1103/PhysRevB.64.113402

The curvature effects in carbon nanotubes are studied analytically as a function of chirality. The pi-orbitals are found to be significantly rehybridized in all tubes, so that they are never normal to the tubes' surface. This results in a curvature induced gap in the electronic band-structure, which turns out to be larger than previous estimates. The tilting of the pi-orbitals should be observable by atomic resolution scanning tunneling microscopy measurements.

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