Plasma oscillations of the carbon peapod

Abstract

We use a jellium model and the classical approach to study plasma oscillations ofa carbon peapod. The dipole–dipole interaction between the C60 molecules in thearray of C60 molecules encapsulated in a carbon nanotube is found to affect thelongitudinal and transverse modes differently. The energy of the longitudinalmode is lowered, while the energy of the transverse mode is raised. The couplingbetween the nanotube and C60 molecules is found to be weak for longitudinalmodes and strong for transverse modes. A carbon peapod is predicted to haveLuttinger liquid behaviour similar to that of a carbon nanotube alone.