Double-resonant Raman scattering in graphite: Interference effects, selection rules, and phonon dispersion
- 8 October 2004
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 70 (15), 155403
- https://doi.org/10.1103/physrevb.70.155403
Abstract
We present a comprehensive analysis of double-resonant Raman scattering in graphite and derive an analytical expression for the Raman cross section of the mode in one dimension. The extension to two dimensions does not change the double-resonant phonon wave vectors. In the full integration of the Raman cross section, the contributions by phonons from exactly the point cancel due to destructive interference. We calculate the mode explicitly based on recent experimental data of the graphite phonon dispersion. Applying the selection rules, a mapping of additional disorder-induced and second-order Raman modes onto the Brillouin zone of graphite is obtained.
Keywords
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