On the use of Drift-Diffusion and Hydrodynamic Transport Models for Simulating the Negative Differential Mobility Effect

Abstract

In simulations of III-V devices, convergence issues are often observed when using drift-diffusion and hydrodynamic transport in conjunction with the negative differential mobility model. This paper explains the cause of the problem for each of the two transport models. Furthermore, known measures for achieving convergence and their implications are discussed.