Analysis on band structure and NEGF approach for graphene as a channel material

This paper presents the matrix version of Non-equilibrium Green´s function (NEGF) approach to model transport problems for 2D graphene conductor. Nearest neighbor tight binding model is used to find the dispersion relation and from that the tuning of band gap energy by controlling the width of graphene layer is observed. The device Hamiltonian and self-energy matrices are formed suitably to calculate the NEGF equations. Finally the preciseness is tested by observing nice steps in the transmission function.