SrTiO3(001), a prototypical perovskite oxide surface, is a promising candidate for all-oxide electronics. Atomic configuration of a bare surface is commonly assumed to be bulk-terminated (1×1), which is far from warranted – noncontact atomic force microscopy (nc-AFM) reveals that only through ferroelectricity-assisted cleaving in ultrahigh vacuum , a (1×1) SrTiO3(001) closest to the pristine can be obtained . Both surface terminations appear as two domains of opposite polarization. This provides dichotomous selectivity for applications, as these domains behave differently under UV illumination: while metallic TiO2 surface is unaffected, SrO termination traps excess positive charge.
 I. Sokolović et al. PRM 3,034407(2019)
 I. Sokolović et al. PRB,in print(2021)