Scattering of plasmons at the intersection of two metallic nanotubes: Implications for tunnelling

Details Scattering of plasmons at the intersection of two metallic nanotubes: Implications for tunnelling Scattering of plasmons at the intersection of two metallic nanotubes: Implications for tunnelling

2008-06-12

arxiv.org/abs/0806.2152v2

Phys. Rev. Lett. 101, 256401 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures (revised version)

Scientific paper

10.1103/PhysRevLett.101.256401

We study theoretically the plasmon scattering at the intersection of two metallic carbon nanotubes. We demonstrate that for a small angle of crossing, $\theta \ll 1$, the transmission coefficient is an oscillatory function of $\lambda/\theta$, where $\lambda$ is the interaction parameter of the Luttinger liquid in an individual nanotube. We calculate the tunnel density of states, $\nu(\omega,x)$, as a function of energy, $\omega$, and distance, $x$, from the intersection. In contrast to a single nanotube, we find that, in the geometry of crossed nanotubes, conventional "rapid" oscillations in $\nu(\omega,x)$ due to the plasmon scattering acquire an aperiodic "slow-breathing" envelope which has $\lambda/\theta$ nodes.

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