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Título

Direct imaging of quantum wires nucleated at diatomic steps

AutorMolina, Sergio I.; Varela, María; Sales, David L.; Ben, Teresa; Pizarro, J.; Galindo, P. L.; Fuster, David CSIC ORCID ; González Díez, Yolanda CSIC ORCID; González Sotos, Luisa CSIC ORCID ; Pennycook, Stephen J.
Palabras claveAtomic force microscopy
III-V semiconductors
Indium compounds
Internal stresses
Molecular beam epitaxial growth
Nanowires
Nucleation
Scanning-transmission electron microscopy
Self-assembly
Semiconductor growth
Semiconductor quantum wires
Stress relaxation
Fecha de publicación2-oct-2007
EditorAmerican Institute of Physics
CitaciónApplied Physics Letters 91, 143112 (2007)
ResumenAtomic steps at growth surfaces are important heterogeneous sources for nucleation of epitaxial nano-objects. In the presence of misfit strain, we show that the nucleation process takes place referentially at the upper terrace of the step as a result of the local stress relaxation. Evidence for strain-induced nucleation comes from the direct observation by postgrowth, atomic resolution, Z-contrast imaging of an InAs-rich region in a nanowire located on the upper terrace surface of an interfacial diatomic step.
Versión del editorhttp://dx.doi.org/10.1063/1.2790483
http://link.aip.org
URIhttp://hdl.handle.net/10261/11966
DOI10.1063/1.2790483
ISSN0003-6951
Aparece en las colecciones: (IMN-CNM) Artículos

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