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Tetragonal and trigonal deformations in zinc-blende semiconductors : a tight-binding point of view

J. -M. Jancu·P. Voisin
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Abstract

The deformation potentials of cubic semiconductors are re-examined from the point of view of the extended-basis $sp^3d^5s^*$ tight-binding model. Previous parametrizations had failed to account properly for trigonal deformations, even leading to incorrect sign of the acoustic component of the shear deformation potential {\it d}. The strain-induced shifts and splittings of the on-site energies of the p- and d-orbitals are shown to play a prominent role in obtaining satisfactory values of deformation potentials both at the zone center and zone extrema. The present approach results in excellent agreement with available experimental data and ab-initio calculations.

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J. -M. Jancu, P. Voisin. 2007-03-01. Tetragonal and trigonal deformations in zinc-blende semiconductors : a tight-binding point of view. https://doi.org/10.1103/physrevb.76.115202

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