Physicists just realized they've been wrong about how magnetism works in 2D superconductors for decades.
April 14, 2026
Original Paper
Realistic Pearl vortices in thin film superconductors
arXiv · 2604.09440
The Takeaway
Instead of the behavior everyone assumed, magnetic fields in thin-film superconductors follow a completely different universal curve based on thickness. This rewrite of fundamental physics is crucial for designing the next generation of superconducting sensors and circuits.
From the abstract
We analyze magnetic field profiles of vortices in thin-film superconductors, shedding new light on this old and presumed settled problem. In sufficiently thin films with realistic Ginzburg-Landau parameter $\kappa = 1/\sqrt{2}$, the magnetic screening around a vortex core is neither exponential -- as is expected in bulk -- nor the power-law that was predicted by Pearl. Instead, a universal curve for the magnetic field variation appears that scales with the sample thickness. The thickness depende