The cylindrical devices with tunable positive, infinite, and negative capacitance for dynamic random access memory
Cheol Seong Hwang
Nature Communications, Published online: 14 April 2026; doi:10.1038/s41467-026-71823-z Cylindrical ferroelectric/dielectric capacitors show tunable capacitance, shifting from positive to infinite or negative by varying layer thickness. Models and simulations reveal curvature boosts capacitance via stray-field energy effects.