Atomic Steps Enable 1,000x Easier Quantum Vortex Flow in Superconductors

Japan's Research Center for Materials Nanoarchitectonics observed quantum vortices moving 1,000 times more easily along atomic steps in ultrathin superconductors, with pinning-free flow in magnetic fi

Researchers at Japan's Research Center for Materials Nanoarchitectonics (MANA) observed quantum vortices moving more than 1,000 times more easily along atomic steps than across them in ultrathin superconductors. This behavior was captured using scanning tunneling microscopy on atomic-layer materials and remains pinning-free within magnetic fields of 0.10 to 0.20 tesla. The discovery, published in Physical Review B (volume 114, issue 5, 2026), shows vortex flow is tunable via temperature or magnetic field adjustments and governed by quantum tunneling at low temperatures.

The mechanism—atomic steps guiding quantum vortices—could reduce transmission losses in specific superconducting grid applications where ultrathin materials are used. By enabling more efficient vortex movement without magnetic field pinning, this work addresses a key barrier to practical superconductors that operate under moderate magnetic fields.

This advancement moves energy efficiency closer to reality for niche grid systems but requires further development to scale. What to watch: practical implementation for power transmission, as the effect is limited to ultrathin superconductors with atomic-scale surface steps and magnetic fields below 0.20 tesla. The source notes practical applications need additional work.

Source: ScienceDaily