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- W2028793272 endingPage "1824" @default.
- W2028793272 startingPage "1817" @default.
- W2028793272 abstract "Resonant Raman scattering has been used to study amorphous carbon and polycrystalline diamond films. The incident photon energies were varied over the range 2.2--4.8 eV. In hydrogenated amorphous carbon films containing both ${mathrm{sp}}^{3}$- and ${mathrm{sp}}^{2}$-bonded carbon, a high-frequency shift is observed for the main Raman peak with increasing photon energies up to 3.5 eV. This shift is interpreted in terms of scattering from ensuremath{pi}-bonded carbon clusters which is resonantly enhanced for photon energies approaching the ensuremath{pi}-${ensuremath{pi}}^{mathrm{*}}$ resonance of ${mathrm{sp}}^{2}$-bonded carbon. In polycrystalline diamond films excitation with photon energies ensuremath{ge}3.0 eV enhances the Raman signal from the ${mathrm{sp}}^{3}$-bonded diamond phase relative to the scattering by ${mathrm{sp}}^{2}$-bonded carbon and with respect to the underlying broadband luminescence. The Raman band arising from scattering by ${mathrm{sp}}^{2}$-bonded carbon shows a high-frequency shift with increasing photon energy for energies ensuremath{ge}3.0 eV. Possible models for the structure of this ${mathrm{sp}}^{2}$-bonded carbon phase are discussed on the basis of the present Raman data." @default.
- W2028793272 created "2016-06-24" @default.
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- W2028793272 date "1989-07-15" @default.
- W2028793272 modified "2023-10-17" @default.
- W2028793272 title "Resonant Raman scattering of amorphous carbon and polycrystalline diamond films" @default.
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- W2028793272 doi "https://doi.org/10.1103/physrevb.40.1817" @default.
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