Transport properties of LaTiO3+x films and heterostructures

We report on the transport properties of LaTiO3+epsilon and LaTiO3.5 films. The LaTiO3+epsilon samples show metallic transport and several samples exhibit a hysteretic drop of resistance during cooldown at similar to240 K. The ferroelectric LaTiO3.5 samples, grown in capacitor structures, have nonlinear, diode-like and hysteretic V(I) characteristics. Two charge-controlled transport regimes are found, which can be utilized for switching the devices between two voltage states. (C) 2003 American Institute of Physics.