Nonlinear effects in 3rd and 4th-order moments of transport-hydrodynamical models in semiconductors within Extended Thermodynamics

Abstract

In this paper, we treat the closure relations of hydrodynamical models in order to study electron transport in semiconductors. We adopt the Extended Thermodynamics theory in order to derive hydrodynamical equations for carrier transport and we try to close the system, i.e. to find constitutive equations for the third and fourth-order moments, by means of a generalized nonequilibrium distribution function.