What happens when a superconductor becomes so thin that electrons can no longer behave as if they were moving through an ordinary three-dimensional piece of metal? This question has been at the center of my recent work on quantum confinement in metallic films. Over the past few years, I have be...
Source: [Phys.org](https://phys.org/news/2026-08-superconductors-thinner-accommodate-magnetic-fields.html)