Figure 34: (a) RHEED oscillations during the growth of an STO thin film at 𝑇 s u b 7 0 0 °C, p(O2) = 0.002 mbar, and 𝐹 1 . 9  J/cm2. The oscillations are visible over the whole measurement time even for a laser repetition frequency of 3 Hz. The time positions 1, 2, 3 correspond to the recording of the RHEED images marked 1, 2, 3 (right). In RHEED image no. 1, the specular (0,0) spot is framed which is used for recording the oscillations throughout this section. (b) A detailed look on three RHEED oscillations during growth with 1 Hz. A substructure related to the single laser pulses (marked by red triangles) is resolved. One STO monolayer is grown with 12 pulses.