Determination of alloy composition and strain in multiple AlGaN buffer layers in GaN/Si system

作者: Abdul Kadir , Chieh Chih Huang , Kenneth Eng Kian Lee , Eugene A. Fitzgerald , Soo Jin Chua

DOI: 10.1063/1.4904007

关键词:

摘要: A method for absolute evaluation of alloy composition and strain in AlGaN buffer layers GaN/Si system is described, which can be applied to any III-nitride alloys hetero-epitaxially grown on Si (111) or sapphire (0001) substrate. Absolute measurements reciprocal space maps (10-14) nitride are performed with the help (313) lattice points. The strain-relaxation state all directly calculated from values points referenced proposed analysis using substrate more accurate than currently favored an epitaxial GaN layer used as reference. knowledge greater accuracy would useful designing growing devices.

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