Local-environment approach for deep-level defects in semiconductors: Application to the vacancy in silicon
- 15 January 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 37 (3) , 1320-1327
- https://doi.org/10.1103/physrevb.37.1320
Abstract
A local-environment approach for calculating the electronic structure of localized defects in semiconductors is described. The method starts out from a description of the semiconductor in terms of localized orbitals and is based on the recursion method of Haydock and co-workers. A repeated symmetrical supercell containing 686 atoms plus defects is formed, allowing both the translational and the point-group symmetry of the crystal to be exploited. As a first application of the method, we apply it to the undistorted isolated vacancy in silicon using a self-consistent Hamiltonian. The results agree well with those of previous detailed studies. Due to the great inherent flexibility of the method, it should be a valuable tool for studying, for instance, impurities in the presence of lattice relaxation and impurity complexes.Keywords
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