Data for High-Temperature Oxygen-Assisted Molecular Beam Epitaxy of BaWO4 on W(110): Growth Mechanism and Structural Characterization

We study the growth of barium tungstate, BaWO4, by high-temperature oxygen-assisted molecular beam epitaxy on W(110). Barium tungstate grows in the form of isosceles triangular-shaped islands, tens of micrometers wide and tens of nanometers in height. The growth was monitored in real timeby low-energy electron microscopy and characterized in situ by low-energy electron difraction, x-ray absorption and x-ray photoelectron spectroscopies. Further ex situ characterization was performed by optical and atomic force microscopies and Raman spectroscopy. Barium tungstate growth on W(110) was performed by dosing only barium in a molecular oxygen atmosphere due to incorporation of W atoms from the W(110) substrate. The islands correspond to the BaWO4(011) crystallographic orientation and their sides are aligned along the [001] and [111] directions of the BaWO4 crystal.