The atmospheres around dislocations in bulk samples of Te-doped material were studied by using optical and electronic techniques. The recombinative atmospheres were chemically revealed by DSL, and were then studied using electron beam-induced current and micro-Raman spectroscopic techniques. Carrier depletion of local crystal misorientations was commonly observed. Transmission electron microscopy permitted the details of these atmospheres to be determined. The formation of micro-loops appeared to be the main reason for the structural changes which were observed.

P.Martin, C.Frigeri, J.Jimenez, J.Weyher: Materials Science and Engineering B, 1996, 42[1-3], 225-9