Impurity effects on Fabry-Perot physics of ballistic carbon nanotubes

Details Impurity effects on Fabry-Perot physics of ballistic carbon nanotubes Impurity effects on Fabry-Perot physics of ballistic carbon nanotubes

2011-09-06

arxiv.org/abs/1109.1104v1

Phys. Rev. B 84, 153408 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.84.153408

We present a theoretical model accounting for the anomalous Fabry-Perot pattern observed in the ballistic conductance of a single-wall carbon nanotubes. Using the scattering field theory, it is shown that the presence of a limited number of impurities along the nanotube can be identified by a measurement of the conductance and their position determined. Impurities can be made active or silent depending on the interaction with the substrate via the back-gate. The conceptual steps for designing a bio-molecules detector are briefly discussed.

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