Energy States of Ni in Zn1-xMnxSe:Ni Solid Solutions
S.A. Permogorov, L.N. Tenishev
A.F. Ioffe Physical-Technical Institute, Russian Academy of Sciences, Politechnicheskaya 26, 194021 St.-Petersburg, Russia

V.I. Sokolov and T.P. Surkova
Institute of Metal Physics, Russian Academy of Sciences, Ural Department, Kovalevskaya 18, 620219 Ekaterinburg, GSP-170, Russia
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Absorption and reflectivity measurements were carried out on Zn1-xMnxSe:Ni solid solutions. The spectra demonstrate the radical change of the structure of internal Ni2+(3d8) transitions at the presence of the Mn ions and strong dependence on Mn concentration. The threshold energy ħωth for the process of Ni photoionization to the valence band Ni2+(3d8) + ħωth → Ni1+(3d9) + h is shifted to the lower energy by 30 meV, but hardly depends on x despite the essential increase in the energy gap.
DOI: 10.12693/APhysPolA.82.705
PACS numbers: 78.20.Wc, 78.50.Ge