A systematic investigation on the mechanisms of nucleation and surface morphology evolution was performed on ZnTe epilayers, deposited on chemically etched GaAs~001! by metalorganic vapor phase epitaxy. A 2D–3D growth mode transition was observed at around two ZnTe equivalent monolyers ~ML!, which was ascribed to a Stransky–Krastanow growth mode. The 3D growth behavior was correlated to the development of $n11%-type planes, leading to a surface ridging effect along the @11¯0# direction for 4000-ML-thick ZnTe epilayers. The use of a solid-on- solid kinetic roughening model allowed the identification of a mechanism that limits the self- organization of ZnTe nanosized islands, namely, the high density of kink sites found in non- atomically flat GaAs substrates.
Longo, M., Lovergine, N., Mancini, A.m., Leo, G., Berti, M. (1998). Investigation of growth mode behavior and surface morphology evolution of metalorganic vapor phase epitaxy grown ZnTe layers on (001) GaAs. JOURNAL OF VACUUM SCIENCE & TECHNOLOGY. B, 16(5), 2650-2655 [10.1116/1.590250].
Investigation of growth mode behavior and surface morphology evolution of metalorganic vapor phase epitaxy grown ZnTe layers on (001) GaAs
Longo, M.;
1998-01-01
Abstract
A systematic investigation on the mechanisms of nucleation and surface morphology evolution was performed on ZnTe epilayers, deposited on chemically etched GaAs~001! by metalorganic vapor phase epitaxy. A 2D–3D growth mode transition was observed at around two ZnTe equivalent monolyers ~ML!, which was ascribed to a Stransky–Krastanow growth mode. The 3D growth behavior was correlated to the development of $n11%-type planes, leading to a surface ridging effect along the @11¯0# direction for 4000-ML-thick ZnTe epilayers. The use of a solid-on- solid kinetic roughening model allowed the identification of a mechanism that limits the self- organization of ZnTe nanosized islands, namely, the high density of kink sites found in non- atomically flat GaAs substrates.File | Dimensione | Formato | |
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Investigation of growth mode behavior and surface morphology evolution of MOVPE ZnTe on GaAs.pdf
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