Energy Levels and Electrical Activity of Dislocation Electron States in GaAs |
| T. Wosiński and T. Figielski Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland |
| Dedicated to Professor Dr. Julian Auleytner on the occasion of his 70th birthday |
| Received: August 3, 1992 |
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| Experimental results are presented confirming that the two energy levels in GaAs: Ec - 0.68 eV and Ev + 0.37 eV, discovered in plastically deformed crystals, belong actually to dislocations. In view of recent identification of the electron state of misfit dislocations at an InGaAs/GaAs interface, a correspondence between these levels and dislocation types has been reinterpreted. The first mentioned leve1 belongs likely to α while the second one to β dislocations of 60° (glide set) type. Such a correspondence is compatible with the observed effect of irradiation on dislocation glide motion in GaAs. It is also argued that these energy levels are involved in the phenomenon of unquenchability of the EL2 defects placed in high-stress regions near dislocations. |
| DOI: 10.12693/APhysPolA.83.51 PACS numbers: 61.70.-r, 71.55.Eq |