Fig. 2: Polarization enhancement from cooperative interfaces.
From: In-situ monitoring of interface proximity effects in ultrathin ferroelectrics
a ISHG signal during ongoing (filled blue symbols, 0–16 u. c.) and halted (filled black symbols) growth. The inset shows the chemistries of interfacial planes at the PTO∣LSMO interface and the polarization direction set by the bottom interface. b Time-dependent ISHG signal after interrupting deposition, normalized to the maximum value = 100. c Post-deposition STEM map of the dipole moments. The arrows show the direction (color wheel) and amplitude (arrow length) of the dipole moments (top). Scale bar is 1 nm. The OOP B-site displacement (δB) of the persistent state is mapped throughout the PTO∣LSMO bilayer (bottom). Black symbols refer to LSMO, and blue symbols refer to downwards polarization in PTO. The error bars are the standard error of the mean.
