Journal
PHYSICAL REVIEW LETTERS
Volume 85, Issue 24, Pages 5214-5217Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.85.5214
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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 D 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 D-mode frequency shift (60 cm(-1)/eV) agrees well with the experimental value.
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