Atomic-scale visualization of initial growth of homoepitaxial SrTiO3   thin film on an atomically ordered substrate
  The initial homoepitaxial growth of SrTiO3 on a (\surd13\times\surd13) - R33.7{\deg}SrTiO3(001) substrate surface, which can be prepared under oxide growth conditions, is atomically resolved by scanning tunneling microscopy. The identical (\surd13\times\surd13) atomic structure is clearly visualized on the deposited SrTiO3 film surface as well as on the substrate. This result indicates the transfer of the topmost Ti-rich (\surd13\times\surd13) structure to the film surface and atomic-scale coherent epitaxy at the film/substrate interface. Such atomically ordered SrTiO3 substrates can be applied to the fabrication of atom-by-atom controlled oxide epitaxial films and heterostructures. 
Ryota Shimizu, Katsuya Iwaya, Takeo Ohsawa, Susumu Shiraki, Tetsuya   Hasegawa, Tomihiro Hashizume, and Taro Hitosugi
cond-mat.mtrl-sci