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PARALLEL DOMAIN DECOMPOSITION APPLIED TO 3 D SIMULATION OF GRADUAL HBTS

This paper presents the implementation of a parallel solver for the Poisson, hole and electron continuity equations applied to a three-dimensional simulation of gradual HBT's in a memory distributed multiprocessor. These equations were discretised using a finite element method (FEM) on an unstructured tetrahedral mesh. Domain decomposition methods were used to solve the linear systems. We have simulated a gradual HBT, and we present electrical results and some measures of the efficiency of the parallel execution for several solvers. This code was implemented using a message-passing standard library MPI and was tested on a CRAY T3E.