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Title
Japanese: 
English:Strain-induced metal-insulator transition in t2g electron system of perovskite titanate Sm0.5Ca0.5TiO3 filmss 
Author
Japanese: 吉松 公平, 岡部宏和, 大島 孝仁, 上田 茂典, 大友 明.  
English: K. Yoshimatsu, Hirokazu Okabe, T. Oshima, S. Ueda, A. Ohtomo.  
Language English 
Journal/Book name
Japanese: 
English:Physics Review B 
Volume, Number, Page Vol. 93    19    195159
Published date May 27, 2016 
Publisher
Japanese: 
English:American Physical Society 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL https://journals.aps.org/prb/abstract/10.1103/PhysRevB.93.195159
 
DOI https://doi.org/10.1103/PhysRevB.93.195159
Abstract We have demonstrated a strain-induced metal-insulator transition for weak Jahn-Teller effects in a t 2g electron system of Sm 0.5 Ca 0.5 TiO 3 , which has metallic ground states in the bulk. A clear variation of electronic properties in Sm 0.5 Ca 0.5 TiO 3 thin films was investigated as a function of epitaxial stain by changing a substrate and the film thickness. Under strong biaxial tensile strain, metallic behaviors were completely eliminated, as evidenced by the temperature dependence of resistivity. The observed metal-insulator transition was consistent with the behavior of the Ti 3d density of states at the Fermi level seen in valence band hard x-ray photoemission spectra.

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