Resonant versus anti-resonant tunneling at carbon nanotube A-B-A heterostructures

Details Resonant versus anti-resonant tunneling at carbon nanotube A-B-A heterostructures Resonant versus anti-resonant tunneling at carbon nanotube A-B-A heterostructures

2001-10-11

arxiv.org/abs/cond-mat/0110243v1

phys. stat. sol. (b) 226, No. 1, 79-85 (2001)

Physics

Condensed Matter

Published in phys. stat. sol. (b); 6 pages, 4 figures

Scientific paper

Narrow antiresonances going to zero transmission are found to occur for general (2n,0)(n,n)(2n,0) carbon nanotube heterostructures, whereas the complementary configuration, (n,n)(2n,0)(n,n), displays simple resonant tunneling behaviour. We compute examples for different cases, and give a simple explanation for the appearance of antiresonances in one case but not in the other. Conditions and ranges for the occurence of these different behaviors are stated. The phenomenon of anti-resonant tunneling, which has passed unnoticed in previous studies of nanotube heterostructures, adds up to the rich set of behaviors available to nanotube based quantum effect devices.

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