Scientists control superconductivity with electric gates using magnetic imaging

AI Insight

Researchers developed a method to directly visualize the suppression of superconductivity in materials using gate voltage control, observing changes through the Meissner effect (the expulsion of magnetic fields by superconductors). They demonstrated that applying an electric field via a gate electrode can controllably turn superconductivity on and off in thin superconducting films, with the transitions mapped in real-time using scanning magnetic microscopy techniques. This work provides direct spatial imaging of electrically-tuned quantum phase transitions in superconducting materials.

Why it matters

This technique enables precise, reversible electrical control of superconductivity without chemical doping or physical modification, which could lead to new superconducting electronic devices and switches. The ability to visualize these transitions spatially advances our understanding of quantum materials and could accelerate development of energy-efficient quantum computing components and ultra-low power electronics.