Istituto di Matematica Applicata e Tecnologie Informatiche     
Holst S., Jüngel A., Pietra P. Finite element discretizations of semiconductor energy-transport equations. Preprint ercim.cnr.ian//2002-1323, 2002.
Energy-transport models describe the flow of electrons in a semiconductor crystal. Several formulations of these models, in the primal or dual entropy variables or in the drift-diffusion-type variables, are reviewed. A numerical discretization of the steady-state drift-diffusion-type formulation using mixed-hybrid finite elements introduced by Marini and Pietra is presented. The scheme is first applied to the simulation of a one-dimensional ballistic diode with non-parabolic band diagrams.Then a two-dimensional deep submicron MOSFET device with parabolic bands is simulated, using an adaptively refined mesh.
Subject Mixed finite elements, exponential fitting, adaptive schemes, semiconductors
65N30, 82D37, 78A36

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