Quasiparticle calculations for point defects at semiconductor surfaces

A. Schindlmayr, M. Scheffler, in: D.A. Drabold, S.K. Estreicher (Eds.), Theory of Defects in Semiconductors, Springer, Berlin, Heidelberg, 2007, pp. 165–192.

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We present a quantitative parameter-free method for calculating defect states and charge-transition levels of point defects in semiconductors. It combines the strength of density-functional theory for ground-state total energies with quasiparticle corrections to the excitation spectrum obtained from many-body perturbation theory. The latter is implemented within the G0W0 approximation, in which the electronic self-energy is constructed non-self-consistently from the Green’s function of the underlying Kohn–Sham system. The method is general and applicable to arbitrary bulk or surface defects. As an example we consider anion vacancies at the (110) surfaces of III–V semiconductors. Relative to the Kohn–Sham eigenvalues in the local-density approximation, the quasiparticle corrections open the fundamental band gap and raise the position of defect states inside the gap. As a consequence, the charge-transition levels are also pushed to higher energies, leading to close agreement with the available experimental data.
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Book Title
Theory of Defects in Semiconductors
Volume
104
Page
165-192
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Schindlmayr A, Scheffler M. Quasiparticle calculations for point defects at semiconductor surfaces. In: Drabold DA, Estreicher SK, eds. Theory of Defects in Semiconductors. Vol 104. Topics in Applied Physics. Berlin, Heidelberg: Springer; 2007:165-192. doi:10.1007/11690320_8
Schindlmayr, A., & Scheffler, M. (2007). Quasiparticle calculations for point defects at semiconductor surfaces. In D. A. Drabold & S. K. Estreicher (Eds.), Theory of Defects in Semiconductors (Vol. 104, pp. 165–192). Berlin, Heidelberg: Springer. https://doi.org/10.1007/11690320_8
@inbook{Schindlmayr_Scheffler_2007, place={Berlin, Heidelberg}, series={Topics in Applied Physics}, title={Quasiparticle calculations for point defects at semiconductor surfaces}, volume={104}, DOI={10.1007/11690320_8}, booktitle={Theory of Defects in Semiconductors}, publisher={Springer}, author={Schindlmayr, Arno and Scheffler, Matthias}, editor={Drabold, David A. and Estreicher, Stefan K.Editors}, year={2007}, pages={165–192}, collection={Topics in Applied Physics} }
Schindlmayr, Arno, and Matthias Scheffler. “Quasiparticle Calculations for Point Defects at Semiconductor Surfaces.” In Theory of Defects in Semiconductors, edited by David A. Drabold and Stefan K. Estreicher, 104:165–92. Topics in Applied Physics. Berlin, Heidelberg: Springer, 2007. https://doi.org/10.1007/11690320_8.
A. Schindlmayr and M. Scheffler, “Quasiparticle calculations for point defects at semiconductor surfaces,” in Theory of Defects in Semiconductors, vol. 104, D. A. Drabold and S. K. Estreicher, Eds. Berlin, Heidelberg: Springer, 2007, pp. 165–192.
Schindlmayr, Arno, and Matthias Scheffler. “Quasiparticle Calculations for Point Defects at Semiconductor Surfaces.” Theory of Defects in Semiconductors, edited by David A. Drabold and Stefan K. Estreicher, vol. 104, Springer, 2007, pp. 165–92, doi:10.1007/11690320_8.
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