TY - JOUR
T1 - Atomically resolved surface structure of SrTiO3(001) thin films grown in step-flow mode by pulsed laser deposition
AU - Iwaya, Katsuya
AU - Ohsawa, Takeo
AU - Shimizu, Ryota
AU - Hashizume, Tomihiro
AU - Hitosugi, Taro
PY - 2010/7
Y1 - 2010/7
N2 - The surface structure of SrTiO3(001) thin films homoepitaxially grown in step-flow mode by pulsed laser deposition was characterized using scanning tunneling microscopy. One-dimensional (1D) TiOx -based nanostructures were formed on the surface, and their density increased with increasing film thickness. Most of the 1D nanostructures disappeared after post-deposition annealing, and the resulting surface exhibited a domain structure with (2 × 1) and (1 × 2) reconstructions and fewer oxygen vacancies. These results imply that the step-flow growth is likely to produce a TiOx -rich surface and Ti deficiencies in the film, and that annealing can effectively reduce the density of atomic defects.
AB - The surface structure of SrTiO3(001) thin films homoepitaxially grown in step-flow mode by pulsed laser deposition was characterized using scanning tunneling microscopy. One-dimensional (1D) TiOx -based nanostructures were formed on the surface, and their density increased with increasing film thickness. Most of the 1D nanostructures disappeared after post-deposition annealing, and the resulting surface exhibited a domain structure with (2 × 1) and (1 × 2) reconstructions and fewer oxygen vacancies. These results imply that the step-flow growth is likely to produce a TiOx -rich surface and Ti deficiencies in the film, and that annealing can effectively reduce the density of atomic defects.
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U2 - 10.1143/APEX.3.075701
DO - 10.1143/APEX.3.075701
M3 - Article
AN - SCOPUS:77954469275
VL - 3
JO - Applied Physics Express
JF - Applied Physics Express
SN - 1882-0778
IS - 7
M1 - 075701
ER -