Electron family creates previously unknown state of matter

An international research team has demonstrated a completely novel state of matter in a metal. It is created by the combination of four electrons-until now, only electron pairs were known. This discovery could lead to a new type of superconductivity, an entirely new research direction, and revolutionary technologies such as quantum sensors.

source https://www.sciencedaily.com/releases/2021/11/211105134634.htm