New EPR data for chromium in electron-irradiated p-type GaAs: the observation of Cr complexes
- 28 February 1981
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 14 (6), L139-L144
- https://doi.org/10.1088/0022-3719/14/6/005
Abstract
Gallium arsenide doubly doped with zinc and chromium has been subjected to 2 MeV electron irradiation in stages at room temperatures and examined by the EPR technique after each stage. When the free carrier absorption is first eliminated a signal attributed to Crs4+ is observed, but with further dose, spectra due to Cr in lower symmetries are observed. A predominant centre has C3v symmetry and is tentatively ascribed to (Crs4+-Gai) nearest-neighbour pairs. The pairing results from the displacement and subsequent motion of intrinsic defects introduced by the irradiation.Keywords
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