Journal
APPLIED PHYSICS LETTERS
Volume 76, Issue 12, Pages 1561-1563Publisher
AMER INST PHYSICS
DOI: 10.1063/1.126096
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We investigate, through first-principles calculations, the effects of a flattening distortion on the electronic properties of a semiconductor carbon nanotube. The flattening causes a progressive reduction of the band gap from 0.92 eV to zero. The band-overlap insulator-metal transition occurs for an interlayer distance of 4.6 Angstrom. Supposing that the flattening of the nanotube can be produced by a force applied by a scanning microscope tip, we estimate that the force per unit length of the nanotube that is necessary to reach the insulator-metal transition is 7.4 N/m. (C) 2000 American Institute of Physics. [S0003-6951(00)03512-9].
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