Low Temperature Physics: 35, 83 (2009); https://doi.org/10.1063/1.3064915 (6 pages)
Fizika Nizkikh Temperatur: Volume 35, Number 1 (January 2009), p. 109-115    ( to contents , go back )

Donor exciton of cobalt and its interaction with lattice vibrations in ZnO:Co semiconductor crystals

N.B. Gruzdev, V.I. Sokolov

Institute of Metal Physics RAS, Ekaterinburg 620041, Russia
E-mail: visokolov@imp.uran.ru

G.A. Yemelchenko

Institute of Solid State Physics RAS, Chernogolovka, Moscow region, 142432, Russia
pos Анотація:

Received Jule 24, 2008

Abstract

The vibrational states of the ZnO:Co compound interacting with the donor exciton were revealed by the sensitive method of field exciton-vibrational spectroscopy. Using the available data on symmetrized local density of the ZnO and ZnO:Ni3+ states, the vibrational modes of the electron absorption spectrum of ZnO:Co in the field of donor exciton were interpreted. The results were compared with those obtained earlier for II–VI:Ni compounds in the case of acceptor exciton. The position of the Co2+ donor level was determined with respect to the conduction band bottom. This position is in good agreement with the universal trend of changing the 3d-ions donor levels in II–VI-compounds.

PACS: 71.20.Be Transition metals and alloys;
PACS: 71.20.Nr Semiconductor compounds.

Key words: electroabsorption, donor level, lattice vibrations, excitons.

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