Surface study of the (4x1)/(1x4) structure of Anatase (001) films grown by PLD and MBE

The objective is to determine the (4x1) surface superstructure of an anatase-TiO2(001) film grown by PLD under UHV conditions. A similar experiment was conducted at BM32 in 2020. The measured set of fractional rods, consisting of a set of seven reflections, was not sufficient to allow us to discriminate between the models found in the literature. We requested beam time to take a new data set in BM32 with new films presenting surface terraces 5 times (500 nm) larger than those initially measured three years ago in 2020 in the same beamline (100 nm) [1]. The experiment will be used to compare these films with films prepared by MBE by enhancing the oxygen reactivity using an oxygen cracker during the growth process.