Multidomain Phase-Field Modeling of Negative Capacitance Switching Transients

Continuum phase-field simulations show how a multidomain ferroelectric capacitor in series with a resistor can exhibit a transient response in which the ferroelectric behaves as a negative capacitor. We show that accelerating domain growth leads to negative capacitance (NC), and this happens even when there is no initial switching of the domains. The observed behavior is in close agreement with experimental results of NC transients seen recently in a number of ferroelectric material systems.