Raman scattering in K[sub 4]C[sub 60] and Rb[sub 4]C[sub 60] fullerenes
- Department of Physics, Penn State University, University Park, Pennsylvania 16802 (United States)
Raman-scattering measurements have been performed [ital in] [ital situ] in ultrahigh vacuum on [ital A][sub 4]C[sub 60] ([ital A]=Rb,K) body-centered-tetragonal films prepared by sublimation of alkali metals from [ital A][sub 6]C[sub 60]. The polarized and depolarized spectra indicate substantial broadening of tangential [ital H][sub [ital g]] modes as well as large disorder-induced radial-mode scattering. Alkali-metal local-site disorder due to either compositional fluctuations or site displacements are suggested. This disorder, in addition to electron-correlation effects, is expected to influence the nonmetallic nature of these materials. Variations in [ital H][sub [ital g]] mode frequencies and widths for all [ital x] values emphasize radial-mode electron-phonon damping for [ital x]=3.
- DOE Contract Number:
- FG02-84ER45095
- OSTI ID:
- 6767189
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 51:10; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360606* -- Other Materials-- Physical Properties-- (1992-)
ALKALI METAL COMPOUNDS
CARBIDES
CARBON
CARBON COMPOUNDS
CORRELATIONS
COUPLING
ELECTRON CORRELATION
ELECTRON-PHONON COUPLING
ELEMENTS
FILMS
FULLERENES
NONMETALS
POTASSIUM CARBIDES
POTASSIUM COMPOUNDS
RAMAN SPECTRA
RUBIDIUM CARBIDES
RUBIDIUM COMPOUNDS
SPECTRA
THIN FILMS