Comparison of spatially dispersive models for dyadic intraband conductivity of graphene

摘要: Analytical expressions are presented for the intraband dyadic conductivity of graphene, fully taking into account its spatially dispersive nature arbitrary values wavevector and presence a possible non-zero Fermi energy level. Such derived from semi-classical Boltzmann transport equation solved both within relaxationtime approximation using Bhatnagar-Gross-Krook model (which allows an extra degree freedom to enforce current continuity equation). Numerical results show that ignoring spatial dispersion lead dramatic errors in propagation properties profiles fundamental modes graphene nanoribbons.