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Título

Epitaxy of SrTiO3 on Silicon: The Knitting Machine Strategy

AutorSaint-Girons, Guillaume; Gázquez, Jaume ; Grenet, Geneviève
Palabras claveMolecular-beam epitaxy
Thin-films
Growth
Interface
Sr
Spectroscopy
Stability
Oxides
Layer
Si
Fecha de publicación9-ago-2016
EditorAmerican Chemical Society
CitaciónChemistry of Materials 28 (15): 5347–5355 (2016)
ResumenSrTiO3 (STO) crystalline layers grown on Si open unique perspectives for the monolithic integration of functional oxides in silicon-based devices, but their fabrication by molecular beam epitaxy (MBE) is challenging due to unwanted interfacial reactions. Here we show that the formation of single-crystal STO layers on Si by MBE at the moderate growth temperature imposed by these interface reactions results from the crystallization of a partially separated amorphous mixture of SrO and TiO2 activated by an excess of Sr. We identify the atomic pathway of this mechanism and show that it leads to an antiphase domain morphology. On the basis of these results, we suggest and test alternative STO growth strategies to avoid antiphase boundary formation and significantly improve the STO structural quality. The understanding provided by these results offers promising prospects to crystallize perovskite oxides on semiconductors at moderate temperature and circumvent the issue of parasitic interface reactions.
DescripciónSaint-Girons, Guillaume et al.
Versión del editorhttp://dx.doi.org/10.1021/acs.chemmater.6b01260
URIhttp://hdl.handle.net/10261/148310
DOI10.1021/acs.chemmater.6b01260
ISSN0897-4756
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