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Abstract of Oxides heterostructures for nanoelectronics
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Oxides heterostructures for nanoelectronics DUBOURDIEU C. , GELARD I., SALICIO O., SAINT-GIRONS G., VILQUIN B., HOLLINGER G., , , , , , , , , , , , , , International Journal of Nanotechnology 7 (2010)
We summarise in this paper the work of two groups focusing on the synthesis and characterisation of functional oxide for nanoelectronic
applications. In the first section, we discuss the growth by
liquid-injection MOCVD of oxides heterostructures. Interface
engineering for the minimisation of silicate formation during the
growth of polycrystalline SrTiO3 on Si is first presented. It is
realised via the change of reactant flow or chemical nature at the Si
Surface. We then report on the epitaxy on oxide substrates of
manganites films and superlattices and on their magnetic and electrical
properties. La0.7Sr0.3MnO3 and La0.8MnO3-delta as well as multiferroic
hexagonal ReMnO3 manganites are considered. We show that the film
thickness and related strain may be used to tune the properties.
Finally, we demonstrate the growth of MgO nanowires by CVD at a
moderate temperature of 600 degrees C, using gold as a catalyst. In the
second section, we discuss the growth of epitaxial oxide
heterostructures by MBE. First, the direct epitaxy of SrTiO3 on Si is
considered. Issues and control of the SrTiO3/Si interface are
discussed. An abrupt interface is achieved. We show that SrTiO3 on Si
can be used as a buffer layer for the epitaxy of various perovskite
oxides such as LaAlO3 or La0.7Sr0.3MnO3. La0.7Sr0.3MnO3, films are
ferromagnetic and metallic at room temperature. The epitaxial growth of
complex oxides on Si waters opens Lip the route to the integration of a
wide variety of functionalities in nanoelectronics. Finally, we discuss
the monolithic integration of III-V compounds Such as InP on Si using
epitaxial SrTiO3 buffer layers for the future integration of optics on
Si.
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