Dielectric response of cylindrical nanostructures in a magnetic field

Details Dielectric response of cylindrical nanostructures in a magnetic field Dielectric response of cylindrical nanostructures in a magnetic field

2000-02-03

arxiv.org/abs/cond-mat/0002052v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, 4 figures, RevTeX

Scientific paper

10.1007/PL00011070

We study the magnetic field dependence of the dielectric response of large cylindrical molecules such as nanotubes. When a field-induced level crossing takes place, an applied electric field causes a linear instead of the usual quadratic Stark effect. This results in a large dielectric response. Explicit calculations are performed for doped nanotubes and a rich structure in the real part of the low-frequency dielectric function $\epsilon'(H)$ is found when a magnetic field is applied along the cylinder axis. It is suggested that studies of $\epsilon'(H, T)$ can serve as a spectroscopic tool for the investigation of large ring-shaped or cylindrical molecules.

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