Phase transition in RbC[sub 60]: Vibrational and electronic properties
- Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16802 (United States)
[ital In] [ital situ] Raman scattering, ultraviolet-photoemission-spectroscopy (UPS), and electron-energy-loss-spectroscopy (EELS) measurements have been performed on crystalline films of RbC[sub 60] through the fcc-to-orthorhombic structural phase transition. The Raman spectra exhibit large changes in intensity of modes not active for isolated icosahedra, including ungerade vibrations. This is attributed to a substantial increase in interfullerene coupling in the presence of C[sub 60] merohedral disorder. UPS measurements indicate a finite density of states at the Fermi energy for both phases with small changes in the C[sub 60] derived states through the transition. Low-energy metalliclike excitations are observed in EELS.
- OSTI ID:
- 6950096
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 50:21; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360602* -- Other Materials-- Structure & Phase Studies
ALKALI METAL COMPOUNDS
CARBON
CRYSTAL-PHASE TRANSFORMATIONS
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ELEMENTS
EMISSION
ENERGY LEVELS
ENERGY-LOSS SPECTROSCOPY
EXCITED STATES
FILMS
FULLERENES
NONMETALS
PHASE TRANSFORMATIONS
PHOTOEMISSION
RAMAN SPECTRA
RUBIDIUM COMPOUNDS
SECONDARY EMISSION
SPECTRA
SPECTROSCOPY
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0400-1000 K
THIN FILMS
VIBRATIONAL STATES