Uranium Ditelluride Shows 'Ghost' Superconductivity Above Critical Temperature
Physicists found that uranium ditelluride forms rippling pair density waves — a precursor superconducting pattern — that persist at temperatures above the material's superconducting critical point, providing direct evidence for exotic Cooper-pair behavior in one of the leading spin-triplet superconductor candidates.
- Pair density waves are spatial modulations of electron-pair density — vanishingly rare in any material
- UTe2 is a spin-triplet candidate; demonstrating PDW order there is relevant to topological quantum computing
- Pattern persisting above Tc is theoretically predicted but had not been directly observed in this material