Pulsed laser deposition of SrTiO3/LaGaO3 and SrTiO3/LaAlO3: Plasma plume effects.

Authors :: Aruta, C.
Amoruso, S.
Bruzzese, R.
Wang, X.
Maccariello, D.
Miletto Granozio, F.
Scotti di Uccio, U.
Source :: Applied Physics Letters; 12/20/2010, Vol. 97 Issue 25, p252105, 3p, 1 Chart, 2 Graphs
Publication Year :: 2010
Abstract: The pulsed laser deposition of SrTiO<subscript>3</subscript>/LaGaO<subscript>3</subscript> and SrTiO<subscript>3</subscript>/LaAlO<subscript>3</subscript> interfaces is analyzed with a focus on the kinetic energy of the ablated species. LaGaO<subscript>3</subscript> and LaAlO<subscript>3</subscript> plasma plumes were studied by fast photography and space-resolved optical emission spectroscopy. Reflection high energy electron diffraction was performed proving a layer-by-layer growth up to 10<superscript>-1</superscript> mbar oxygen pressure. The role of the energetic plasma plume on the two-dimensional growth and on the presence of interfacial defects at different oxygen growth pressures is discussed in connection with the conducting properties of the polar/nonpolar interfaces. [ABSTRACT FROM AUTHOR]

Subjects :: PULSED laser deposition
STRONTIUM compounds
LANTHANUM compounds
PLASMA gases
INTERFACES (Physical sciences)
EMISSION spectroscopy
HIGH energy electron diffraction
CRYSTAL growth

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