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Dielectric response of cylindrical nanostructures in a magnetic field

  • P. Fulde
  • A. Ovchinnikov

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.

PACS. 77.22.-d Dielectric properties of solids and liquids - 78.40.Ri Fullerenes and related materials - 75.20.-g Diamagnetism and paramagnetism - 73.23.-b Mesoscopic systems 

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Copyright information

© EDP Sciences, Springer-Verlag, Società Italiana di Fisica 2000

Authors and Affiliations

  • P. Fulde
    • 1
  • A. Ovchinnikov
    • 1
  1. 1.Max-Planck-Institut für Physik Komplexer Systeme, Nöthnitzer Straße 38, 01187 Dresden, GermanyDE

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