Electron transport in crossed nanotubes with point contact

Details Electron transport in crossed nanotubes with point contact Electron transport in crossed nanotubes with point contact

2006-12-28

arxiv.org/abs/cond-mat/0612668v3

Phys. Rev. B 76, 085411 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 9 figures. 2 equations and 2 references added, submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.76.085411

The electron transport in a four-terminal nanodevice consisting of two crossed nanotubes is investigated in the framework of the Landauer-Buttiker formalism. The evident formula for the ballistic conductance of the device is found using a model of crossed conductive cylinders with a point contact between them. Sharp conductance dips stipulated by resonance scattering on the contact are shown to appear in the conductance of the first cylinder. The conductance between the cylinders has resonant behavior. The form and the position of resonant peaks are studied. Our results indicate that the form of asymmetric dips and peaks in the conductance differs from the well-known Fano line shape. We have shown that the maximal value of the conductance between cylinders does not exceed a unit of the conductance quantum.

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