Nanoislands on silicon enable switchable topological textures for high-density data storage. energy-efficient field-effect transistors

https://phys.org/news/2025-01-nanoislands-silicon-enable-switchable-topological.html

"nanoscale ferroelectrics exhibit polar/ sometimes chiral electromagnetic topological textures... stable, controllable/ steerable by external electrical stimulus... BaTiO3 nanostructures form 30–60 nm (on top) trapezoidal islands on silicon substrate, with stable polarization domains... fine tuning 1st step of silicon wafer passivation induces nanoisland nucleation... domains can be electricly reversibly switched... centered, downward convergent polarization... swirling component around nanoisland axis causes chirality"