Intermolecular vibrations in pure and doped C60 |
| |
Authors: | B Renker F Gompf H Schober P Adelmann H J Bornemann R Heid |
| |
Institution: | (1) Kernforschungszentrum Karlsruhe, Institut für Nukleare Festkörperphysik, Postfach 36 40, D-76021 Karlsruhe, Germany |
| |
Abstract: | We discuss the results of inelastic neutron time-of-flight spectroscopy on powder samples of C60, K3C60 and Rb3C60. A well structured density of states is obtained from the raw data where the details can be attributed to translational acoustic/optic and librational modes. The intermolecular excitation spectra for all three compounds can be well understood within the frame-work of lattice dynamics of a molecular crystal. We show that a particular sample preparation is necessary to avoid impurity contributions in particular within the gap region between inter- and intramolecular vibrations. There are indications for a weak anomalous temperature dependence of low energy phonons in K3C60 atT
c
. |
| |
Keywords: | 74 70 W 25 40 F |
本文献已被 SpringerLink 等数据库收录! |