Atomic Control of the SrTiO3 Crystal Surface.
The atomically smooth SrTiO(3) (100) with steps one unit cell in height was obtained by treating the crystal surface with a pH-controlled NH(4)F-HF solution. The homoepitaxy of SrTiO(3) film on the crystal surface proceeds in a perfect layer-by-layer mode as verified by reflection high-energy electron diffraction and atomic force microscopy. Ion scattering spectroscopy revealed that the TiO(2) atomic plane terminated the as-treated clean surface and that the terminating atomic layer could be tuned to the SrO atomic plane by homooepitaxial growth. This technology provides a well-defined substrate surface for atomically regulated epitaxial growth of such perovskite oxide films as YBa(2)Cu(3)O(7-delta).
Kawasaki
M
M
Takahashi
K
K
Maeda
T
T
Tsuchiya
R
R
Shinohara
M
M
Ishiyama
O
O
Yonezawa
T
T
Yoshimoto
M
M
Koinuma
H
H