Abstract:
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 has two effects: it may cause a linear instead of the usual quadratic Stark effect or the difference in the quadratic Stark coefficient of the two levels leads to a discontinuity in the polarization. Explicit calculations are performed for doped nanotubes and a rich structure in the real part of the low-frequency dielectric function is found when a magnetic field is applied along the cylinder axis. It is suggested that studies of can serve as a spectroscopic tool for the investigation of large ring-shaped or cylindrical molecules.
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Received 11 January 2000 and Received in final form 19 May 2000
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Fulde, P., Ovchinnikov, A. Dielectric response of cylindrical nanostructures in a magnetic field. Eur. Phys. J. B 17, 623–627 (2000). https://doi.org/10.1007/PL00011070
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DOI: https://doi.org/10.1007/PL00011070