Ferri-ionic Coupling in CuInP${}_2$S${}_6$ Nanoflakes: Polarization States and Controllable Negative Capacitance

Anna N. Morozovska, Sergei V. Kalinin, Eugene. A. Eliseev +3

We consider nanoflakes of van der Waals ferrielectric CuInP${}_2$S${}_6$ covered by an ionic surface charge and reveal the appearance of polar states with relatively high polarization…