Harnessing ferroelectric domains for negative capacitance.

A pressing quest for overcoming Boltzmann tyranny in low-power nanoscale electronics ignited an extensive search for the devices possessing the negative circuit constants. The emergent concept of the ferroelectric-based negative capacitance triggered then the explosive activity in the field. However, most of the research addressed transient negative capacitance, leaving the basic question of the existence of the steady-state negative capacitance unresolved. Here, we show that the ferroelectric nanodot capacitor hosts a stable two-domain state realizing the static reversible negative capacitance device thus opening routes for the extensive use of the negative capacitance in domain wall-based nanoelectronics. Negative capacitance describes a phenomenon where the increase in the charge of the capacitor results in decreasing its voltage. The authors put forth a ferroelectric nanodot harboring two polarization domains which stabilize static reversible negative capacitance. [ABSTRACT FROM AUTHOR]