The electronic structure of polymerized fullerenes and dimerized heterofullerenes |
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Authors: | Pichler T Knupfer M Golden MS Fink J Winter J Haluska M Kuzmany H Keshavarz-K M Bellavia-Lund C Sastre A Hummelen JC Wudl F |
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Institution: | Universit?t Osnabrück, Fachbereich Physik, D-49069 Osnabrück, Germany (Fax: +49-541/969-26?70; E-mail: chkuper@physik.uni-osnabrueck.de), DE
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Abstract: | \chem{Rb_1C_{60}} and dimerised using electron energy-loss spectroscopy in transmission. From the excitation spectra a reduced density of states is observed for polymerized . This is in contrast to and can be explained by the different type of \squt{doping} and by the different bonding between the fullerene molecules
in the two systems.
Additional information about the optical properties was obtained from the low energy loss function. Using a Kramers-Kronig
analysis, the dielectric function, (), and the optical conductivity, (), have been derived. and the onset of the spectral weight have been compared between the polymer, the dimer and . This onset of spectral weight is found to be at and for o- and for , respectively.
Received: 28 October 1996/Accepted: 13 December 1996 |
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Keywords: | PACS: 61 46+w 71 20 Tx 71 20 -b |
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