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EL2 and related defects in GaAs - Challenges and pitfallsThe incorporation process of nonequilibrium vacancies in melt-grown GaAs is strongly complicated by deviations from stoichiometry, and the presence of two sublattices. Many of the microdefects originating in these vacancies and their interactions introduce energy levels (shallow and deep) within the energy gap. The direct identification of the chemical or structural signature of these defects and its direct correlation to their electronic behavior is not generally possible. It is therefore necessary to rely on indirect methods and phenomenological models and be confronted with the associated pitfalls. EL2, a microdefect introducing a deep donor level, has been in the limelight in recent years because it is believed to be responsible for the semi-insulating behavior of undoped GaAs. Although much progress has been made towards understanding its origin and nature, some relevant questions remain unanswered. An attempt is made to assess the present status of understanding of EL2 in the light of the most recent results.
Document ID
19860037934
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Gatos, H. C.
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Lagowski, J.
(MIT Cambridge, MA, United States)
Date Acquired
August 12, 2013
Publication Date
April 1, 1985
Subject Category
Solid-State Physics
Accession Number
86A22672
Distribution Limits
Public
Copyright
Other

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