We
report the electrical characterizations of La2Ti2O7 thin films synthetized by pulsed laser deposition.
We observe a significant change in I–V curve in the presence of UV light. The conduction mechanism
can be described by two regimes: ohmic at low voltage and space charge
limited conduction for higher voltage. Finally, for the first time
to our knowledge, the charge carrier mobility of this material is
studied; we use the time-of-flight method to investigate this property.
We explain the evolution of the carrier mobility with the applied
voltage by the presence of a depletion layer between the film and
the gold contact, which affects the measurements.