superconductivity

A new study in Nature reports that quantum geometry can enhance superconductivity through a superpotential mechanism while also making the superconducting state unusually stiff and robust. The findings suggest geometry, not only electronic interactions, shapes how superconductors behave, a result physicists are weighing for its implications for designing better superconducting materials.

Physicists report detecting Cooper pairs — the paired electrons responsible for superconductivity — persisting above the material's critical temperature, hidden within pair density waves. The finding is likened to the Cheshire Cat's grin, with the pairs' signature remaining after superconductivity itself vanishes, and could reshape understanding of how unconventional superconductors like cuprates work.

Physicists report using measurements on picosecond timescales to reveal the point at which superconductivity breaks down in materials. By tracking how superconductors respond almost instantaneously, researchers say they can observe the hidden limits of the superconducting state that conventional methods miss. The work is drawing attention among physics researchers interested in how superconductors behave under rapid excitation and what it means for future applications.