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Author Maksimov, O. ♦ Tamargo, M. C.
Sponsorship (US)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Publisher The American Physical Society
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ALLOYS ♦ OPTICAL PROPERTIES ♦ PHOTOLUMINESCENCE ♦ PHYSICS ♦ REFLECTIVITY ♦ SPECTRA
Abstract We have investigated the growth and optical properties of a set of Be{sub x}Zn{sub 1-x}Te epitaxial layers having different composition, with x ranging from 0--0.7. Comparison of the reflectivity and the photoluminescence spectra allowed us to locate the direct-to-indirect band gap crossover for this alloy at x{approx}0.28. The {Gamma}{yields}{Gamma} direct band gap exhibits a linear dependence on composition over the entire compositional range and can be fitted to the equation E{sup {Gamma}}{sub g}(x)=2.26{sup *}(1-x)+4.1{sup *}x. It increases linearly with BeTe content at a rate of 18 meV for a change of 1% in BeTe content. The {Gamma}{yields}X indirect band gap for Be{sub x}Zn{sub 1-x}Te can be fitted to the equation E{sup X}{sub g}(x)=3.05{sup *}(1-x)+2.8{sup *}x-0.5{sup *}x{sup *}(1-x), suggesting that the energy of the indirect {Gamma}{yields}X transition for ZnTe is about 3.05 eV. {copyright} 2001 American Institute of Physics.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2001-08-06
Publisher Place United States
Journal Applied Physics Letters
Volume Number 79
Issue Number 6


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