Optically Detected Magnetic Resonance of Zinc Interstitials and Frenkel Pairs in ZnSe

• DOI: 10.1557/proc-104-3
• Publication Date: 2011-03-06T00:47:36Z
• Authors: G. D. Watkins; F. Rong; W. A. Barry; J. F. Donegan
• Keywords: 0103 physical sciences; 01 natural sciences

ABSTRACTOptical detection of magnetic resonance (ODMR) is reported for ZnSe irradiated by 2.5 MeV electrons in situ at 4.2K. Interstitial zinc atoms are detected in both isolated form and paired with zinc vacancies (Frenkel pairs) of many resolved discrete separations. The isolated interstitial produces a deep second donor state (+/++) at ∼Ec -0.8 eV and its activation energy for migration is estimated to be ∼0.6–0.7 eV. The Frenkel pairs give rise to efficient localized donor-acceptor recombination luminescence and the exchange interactions between the electron and hole on the two partners are measured directly by ODMR.