We performed, to the best of our knowledge, world’s first first-principles calculations for WO2-terminated cubic WO3 (001) surface and analyzed systematic trends in WO3, SrTiO3, BaTiO3, PbTiO3 CaTiO3 ab initio calculations. According principles calculations, all WO2 or TiO2-terminated CaZrO3 upper-layer atoms relax inwards towards crystal bulk, while second-layer upwards. The only two exception...