SHALLOW ACCEPTORS IN GE GESI STRAINED MULTILAYER HETEROSTRUCTURES WITH QUANTUM-WELLS/

The impurity photoconductivity spectra of Ge/Ge1-xSix strained heteros tructures with quantum wells are investigated. It is established that the built-in deformation in quantum-size Ge layers substantially chang es the spectrum of shallow accepters, shifting it into the long-wavele ngth region of the far-IR range. In strong magnetic fields the photoco nductivity lines are observed to split and shift as a function of the field. This makes it possible to carry out a classification of the tra nsitions. (C) 1997 American Institute of Physics.