Publication Type
Journal
Journal Name
Applied Physics Letters
Publication Date
Page Number
32903
Volume
95
Issue
3
Abstract
Polarization-mediated transport properties of ultra-thin (4 and 10 unit cells) fully strained polar BaTiO3 films are studied by Scanning Tunneling Microscopy and Spectroscopy. High quality films are grown on SrRuO3/SrTiO3 by pulsed laser deposition and characterized in situ in ultrahigh vacuum. Previous structural measurements have shown that these films are polarized. Current-Voltage curves exhibit features at ~ �2.5 V, which show hysteresis consistent with bias-induced polarization switching. The intensity and voltage of the features indicate a stochastic process. These features are not observed on non-polarized films.
