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Author Elsharkawy, M. R. M. ♦ Kanda, G. S. ♦ Keeble, D. J. ♦ Abdel-Hady, E. E.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ BINDING ENERGY ♦ CADMIUM TELLURIDES ♦ CHARGE STATES ♦ DENSITY FUNCTIONAL METHOD ♦ DISTRIBUTION ♦ DOPED MATERIALS ♦ POSITRONS ♦ TRAPPING ♦ TRAPS ♦ POSITRON ANNIHILATION SPECTROSCOPY
Abstract Positron lifetime measurements on CdTe 0.15% Zn-doped by weight are presented, trapping to monovacancy defects is observed. At low temperatures, localization at shallow binding energy positron traps dominates. To aid defect identification density functional theory, calculated positron lifetimes and momentum distributions are obtained using relaxed geometry configurations of the monovacancy defects and the Te antisite. These calculations provide evidence that combined positron lifetime and coincidence Doppler spectroscopy measurements have the capability to identify neutral or negative charge states of the monovacancies, the Te antisite, A-centers, and divacancy defects in CdTe.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-06-13
Publisher Place United States
Journal Applied Physics Letters
Volume Number 108
Issue Number 24


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