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Article Dans Une Revue Applied Physics Letters Année : 2005

Nucleation of InN quantum dots on GaN by metalorganic vapor phase epitaxy

Jg Lozano
  • Fonction : Auteur
Am Sanchez
  • Fonction : Auteur
R. Garcia
D. Gonzalez
  • Fonction : Auteur
D. Araujo
Sandra Ruffenach
  • Fonction : Auteur
  • PersonId : 860799
Olivier Briot

Résumé

InN quantum dots (QDs) on GaN (0001) grown by metalorganic vapor phase epitaxy onto a sapphire substrate were studied by transmission electron microscopy (TEM). We found that the nucleation of InN QDs on GaN is directly related to the presence of threading dislocations (TDs) in the center of the QDs. The TEM analysis revealed that the TDs finish at the InN/GaN interface and they are pure edge dislocations. Therefore, spiral growth models cannot explain nucleation of these QDs. Although controlling edge TDs constitute a possible approach to determine the QD density, a better approach may be an increase in the material growth rate in order to enter the diffusion-limited growth mode, where growth is not sensitive to surface heterogeneities. (c) 2005 American Institute of Physics.
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Dates et versions

hal-00390132 , version 1 (01-06-2009)

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Citer

Jg Lozano, Am Sanchez, R. Garcia, D. Gonzalez, D. Araujo, et al.. Nucleation of InN quantum dots on GaN by metalorganic vapor phase epitaxy. Applied Physics Letters, 2005, 87 (26), pp.263104. ⟨10.1063/1.2152110⟩. ⟨hal-00390132⟩
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