Experimental study of three ground state components of the hydrogen-oxygen donor in germanium Article uri icon

abstract

  • Experimental results are presented which show the existence of a ground state manifold consisting of at least three (1S) levels associated with the hydrogen-oxygen donor D(H, O) in ultra-pure germanium. Photothermal ionization spectra were recorded as a function of temperature. In addition to the well-known transitions arising from the stress-insensitive ground state (GS), at T = 6 K a low intensity hydrogenic series of lines is observed with energies 2.51 meV smaller than from the GS, arising from a (1S) energy level lying 1.57 meV above the GS. Above 7 K a further weak transition is observed at 2.97 meV less than the GS series, arising from an energy level 1.94 meV above the GS. A multicomponent (1S) manifold has been predicted by two theoretical models. Our experimental results allow the unambiguous determination of the model parameters and are consistent with the predictions of the tunneling hydrogen model when an excited state splitting of 0.98 meV due to two nuclear configurations is included. © 1987.

publication date

  • 1987-01-01