Fig. 4.

Effect of Dirac cone broadening on Raman process. a CW photoexcitation with mW power does not affect the Dirac cone. b Accordingly, e–h formation induced by e–ph scattering only occurs in presence of resonant ph excitation. c Under ps excitation, with average P_L comparable to a, the linear dispersion is smeared by the large k_BT_e ≈ ħω_G = 0.2 eV. d Consequently, e–h formation is enhanced by the increased ph absorption cross section, due to new intra-band processes. e Corresponding contributions to FWHM(G) for the broadened inter-bands and intra-band processes for α_ek_B = 0.51 cm⁻¹ K⁻¹