Impurity atoms effects on electronic properties and Seebeck coefficient of armchair graphene like nanoribbon

We study thermoelectric and transport properties of armchair nanoribbon doped with impurity atoms in the context of tight binding model hamiltonian. The effect of scattering by dilute charged impurities is discussed in terms of the self-consistent Born approximation. Green’s function approach has been implemented to find the behavior of density of states, transport and Seebeck coefficient of armchair nanoribbon within linear response theory. We have found the temperature dependence of electrical and thermal conductivities for different values of impurity concentration and scattering strength of dopant impurity. Also the dependence of Seebeck coefficient and figure of merit on temperature has been investigated in details. A peak appears in the curves of temperature dependence of Seebeck coefficient and figure of merit for various impurity concentrations and scattering potential strengths. Furtheremore we have found electrical conductivity rises with impurity concentration for any temperature and scattering potential strength.