Numerical determination of one-dimensional energy bands bound to dislocations

It is assumed that the dislocation binding potential issues from their stra in field through the deformation potential and the piezoelectric coupling. Dislocation states are then determined by solving the envelop function Schr odinger equation by means of a standard numerical method which consists in making a plane wave decomposition of the components of the spinor wave func tion. Numerical results give relatively strong binding energies and large 1 D effective masses, in the case of the valence band, leading probably to la rge effects on the doping possibilities for large dislocation densities. (C ) 1999 Elsevier Science B.V. All rights reserved.