Eun-Ah Kim along with Seamus Davis have isolated a "fingerprint" that identifies specific fluctuations in electrons that force them into pairs, causing their host material, in this case, a high-temperature superconductor called lithium iron arsenic, to make way for free-flowing, resistance-free electron pairs.

Check out the full article in Nature Physics.

Highlights of the paper are in the Chronicle.

Video: Comparison between theory (left) and experiment (right) of energy evolution of quasi-particle interference imaging demonstrating fingerprints of spin-fluctuation effects on quasi-particles of a High temperature superconductor LiFeAs.

Image: Quasiparticle Interference (QPI) imaging technique reveals that electron-boson interaction in LiFeAs superconductivity has momentum-space anisotropic self-energy 'fingerprint' of antiferromagnetic spin fluctuations.