Abstract
The model and theoretical understanding of the Raman spectra in disordered and amorphous carbon are given. The nature of the G and D vibration modes in graphite is analyzed in terms of the resonant excitation of \ensuremath{\pi} states and the long-range polarizability of \ensuremath{\pi} bonding. Visible Raman data on disordered, amorphous, and diamondlike carbon are classified in a three-stage model to show the factors that control the position, intensity, and widths of the G and D peaks. It is shown that the visible Raman spectra depend formally on the configuration of the ${\mathrm{sp}}^{2}$ sites in ${\mathrm{sp}}^{2}$-bonded clusters. In cases where the ${\mathrm{sp}}^{2}$ clustering is controlled by the ${\mathrm{sp}}^{3}$ fraction, such as in as-deposited tetrahedral amorphous carbon (ta-C) or hydrogenated amorphous carbon (a-C:H) films, the visible Raman parameters can be used to derive the ${\mathrm{sp}}^{3}$ fraction.
Keywords
Raman spectroscopyAmorphous carbonAmorphous solidMaterials sciencePolarizabilityCarbon fibersSpectral lineExcitationCrystallographyAnalytical Chemistry (journal)Molecular physicsNuclear magnetic resonanceAtomic physicsPhysicsChemistryOpticsMoleculeQuantum mechanics
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Publication Info
- Year
- 2000
- Type
- article
- Volume
- 61
- Issue
- 20
- Pages
- 14095-14107
- Citations
- 14507
- Access
- Closed
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Cite This
Andrea C. Ferrari,
John Robertson
(2000).
Interpretation of Raman spectra of disordered and amorphous carbon.
Physical review. B, Condensed matter
, 61
(20)
, 14095-14107.
https://doi.org/10.1103/physrevb.61.14095
Identifiers
- DOI
- 10.1103/physrevb.61.14095