SHG anisotropic patterns of a 12 u.c. SrRuO 3 /SrTiO 3 (111) heterostructure acquired with the P in – P out (upper) and P in – S out (lower) configurations. Here, P and S stand for P- and S -polarised waves, respectively. The subscripts refer to incident (in) and outgoing (out) waves.
