Abstract
We find that the electronic dispersion in graphite gives rise to double resonant Raman scattering for excitation energies up to 5 eV. As we show, the curious excitation-energy dependence of the graphite mode is due to this double resonant process resolving a long-standing problem in the literature and invalidating recent attempts to explain this phenomenon. Our calculation for the -mode frequency shift ( ) agrees well with the experimental value.
- Received 9 August 2000
DOI:https://doi.org/10.1103/PhysRevLett.85.5214
©2000 American Physical Society