Charge transfer in alkali-metal-doped polymeric fullerenes
1996 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, Vol. 54, no 24, 17486-17492 p.Article in journal (Refereed) Published
We present room-temperature Raman measurements of pressure-polymerized C60 and compare them with the spectra of RbC60 in the orthorhombic phase. Although both materials were prepared according to two completely different routes the spectra show a surprising similarity with respect to mode positions and line splitting. We concluded from this that both materials, the uncharged pressure-polymerized C60 and the rubidium-doped orthorhombic compound, have the same overall structure and the AC60 compounds can be considered as the doped species of the C60, polymerized using moderate low pressure and high temperatures. From a detailed comparison between both spectra mode shifting and line broadening as a consequence of the charge transfer was determined and electron-phonon coupling constants were estimated for the high-frequency Hg(7) and Hg(8) modes. The low values for the coupling constants compared to the ones in the K3C60 can explain the lack of superconductivity in the AC60 compounds.
Place, publisher, year, edition, pages
1996. Vol. 54, no 24, 17486-17492 p.
Fullerenes, C60, Raman spectroscopy, RbC60, rubidium intercalation, orthorhombic polymer, fullerene polymer, charge transfer, high pressure synthesis, pressure-induced polymerization, electron-phonon interaction
Condensed Matter Physics
Research subject Physics
IdentifiersURN: urn:nbn:se:umu:diva-25951DOI: 10.1103/PhysRevB.54.17486OAI: oai:DiVA.org:umu-25951DiVA: diva2:235221