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Title
Japanese: 
English:Combinatorial synthesis and optical characterization of alloy and superlattice films based on SrTiO3 and LaAlO3 
Author
Japanese: 大久保 敦史, 大友 明, 西村 潤, 牧野 哲征, 瀬川 勇三朗, 川崎 雅司.  
English: A. Ohkubo, A. Ohtomo, J. Nishimura, T. Makino, Y. Segawa, M. Kawasaki.  
Language English 
Journal/Book name
Japanese: 
English:Applied Surface Science 
Volume, Number, Page Vol. 252    No. 7    pp. 2488-2492
Published date Jan. 2006 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL <Go to ISI>://000235264100010
 
DOI https://doi.org/10.1016/j.apsusc.2005.03.234
Abstract We have grown alloy and superlattice films consisting of SrTiO3 (STO) and LaAlO3 (LAO) by pulsed laser deposition using composition-spread technique. All the (STO)(x)(LAO)(1-x) (0 <= x <= 1) alloy and superlattice films exhibited a single-phase perovskite structure. The optical properties of these films were characterized by absorption spectroscopy at room temperature. The spectra show a broad absorption due to O 2p-Ti 3d(t(2g)) transition in an ultraviolet region. We found that absorption edges of both alloy and superlattice films systematically shifted to higher energy with increasing LAO composition. Clear difference was observed in the composition dependence of the indirect and a direct band edges.

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