a Calculate the density of states D E of a two dimensional

Last updated: 6/21/2023

a Calculate the density of states D E of a two dimensional 2D elec tron gas with the usual dispersion relation E k xx k b Calculate the density of states D E of graphite In contrast to the 2D electron gas model the dispersion relation of the electrons in graphite graphene plane follows E k 3a070k 2 The equa tion uses the to indicate the conduction band and the valence band Due to the similar dispersion relation between electrons in graphene and photons one calls them Dirac fermions The lattice parameter ao 0 2462 nm and 70 is around 3 eV