Photoluminescence and splitting of dislocations in germanium

Abstract

To prove directly the relation between the emergence of narrow lines in the dislocation photo-l uminescence spectrum of germanium after the second deformation stage and the splitting value Δ of perfect dislocations a special orientation of crystals at the second deformation stage is used. The samples contain dislocations either with Δ > Δ0 or with Δ < Δ0 (Δ0 is the equilibrium splitting value). The narrow lines are found to arise only on the short-w ave side of the line corresponding to equilibrium splitting at Δ > Δ0 and on the long-w ave side at Δ < Δ0. This result and the unique regularity of the narrow line arrangement observed experimentally are considered as a convincing evidence for the effect of the distance between partials on the radiation energy associated with the 90° partials only. [Russian text ignored]