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SIAM J. Sci. Comput. 31, pp. 1120-1140 (21 pages)

A Three-Dimensional Mixed Finite-Element Approximation of the Semiconductor Energy-Transport Equations

Stephan Gadau and Ansgar Jüngel

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The stationary energy-transport equations for semiconductors in three space dimensions are numerically discretized. The physical variables are the electron density, the energy density, and the electric potential. Physically motivated mixed Dirichlet–Neumann boundary conditions are employed. The numerical approximation is based on a hybridized mixed finite-element method with Raviart–Thomas–Nédélec elements, applied to the dual-entropy formulation of the energy-transport model. For the solution of the nonlinear discrete system, a Newton scheme with adaptive potential stepping and two decoupling Gummel-type strategies with reduced rank extrapolation are proposed. Multigate field-effect transistors in two dimensions and three dimensions are numerically simulated.

© 2008 Society for Industrial and Applied Mathematics

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PUBLICATION DATA

ISSN

1064-8275 (print)  
1095-7197 (online)

ARTICLE DATA

History
Received October 24, 2007
Accepted August 25, 2008
Published online December 10, 2008

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