Coupled device-circuit simulation using energy-momentum device models

The use of energy-momentum models for carrier transport is considered in the context of coupled device-circuit simulation. We point out that certain computational methods for uncoupling the computations, successfully employed using drift-diffusion models, can be slightly modified and made compatible with energy-momentum models, assuming only a known or computable “momentum relaxation time”. By such means one can readily compare the results of transient simulations using energy-momentum and drift-diffusion models.