Abstract
Multiwall carbon nanotubes (MWNT) are coaxial cylinders with low translational and rotational energy barriers allowing the inner tubes to easily slide with respect to the outer tubes. Using a tight binding, scattering technique, a computational study of the electron transport properties of MWNT’s is presented. Two types of systems are investigated. The first (a shuttle system) consists of an outer single-wall nanotube (SWNT) connected to external reservoirs, inside of which is located a finite length SWNT of smaller diameter. The second (a telescoping system) consists of a SWNT inserted a finite distance into a larger-diameter SWNT, with the wider tube connected to one reservoir and the smaller-diameter tube connected to a second reservoir. For the first time, these structures are studied using a material-specific Hamiltonian derived from ab initio calculations based on density functional theory. Various commensurate systems are studied, including the (6,6)@(11, 11) double wall nanotube.
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