Zeeman spectroscopy of Zn-H complex in germanium

The Zeeman spectra of the neutral acceptor Zn-H in Ge have been studied in the Voigt geometry with B along the three principal crystallographic direct ions [100], [111] and [110] using plane-polarized radiation with the sample s held near 4.2 K. The results for B parallel to [111] are described in det ail. The interpretation of the data supports the model proposed for this co mplex, viz., that the axis is along a [111] bond direction of the host. Thi s lowers the symmetry of the hole states resulting in a split ground state consisting of two Kramers' doublets. These are sufficiently separated in en ergy for the upper one to be depopulated at the sample temperatures used. T he spectra provide a "template" for the identification of other such comple xes.