Quantum Interference Effects in Electronic Transport through Nanotube Contacts

Details Quantum Interference Effects in Electronic Transport through Nanotube Contacts Quantum Interference Effects in Electronic Transport through Nanotube Contacts

2002-02-15

arxiv.org/abs/cond-mat/0202253v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.67.113409

Quantum interference has dramatic effects on electronic transport through nanotube contacts. In optimal configuration the intertube conductance can approach that of a perfect nanotube ($4e^2/h$). The maximum conductance increases rapidly with the contact length up to 10 nm, beyond which it exhibits long wavelength oscillations. This is attributed to the resonant cavity-like interference phenomena in the contact region. For two concentric nanotubes symmetry breaking reduces the maximum intertube conductance from $4e^2/h$ to $2e^2/h$. The phenomena discussed here can serve as a foundation for building nanotube electronic circuits and high speed nanoscale electromechanical devices.

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