ISSN:
1434-6036
Keywords:
68.55.Gi
;
71.20.Hk
;
71.45.Gm
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Phase pure K3C60 films have been grown using vacuum distillation. The structure of such films could be shown to be face centered cubic consistent with X-ray diffraction studies. The electronic structure of the films has been studied using electron energy-loss spectroscopy in transmission. From C1s core excitation measurements the unoccupied density of states has been determined. Performing the dielectric function has been derived in a wide energy range (0–45 eV). It is shown that the low energy part of the optical conductivity cannot be understood within a simple free electron model but that interband transitions between the three conduction bands have to be taken into account. The spectral weight of interband transitions between valence and conduction bands shows strong momentum dependence due to optical selection rules demonstrating the molecular-like nature of the electronic states.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01318272
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