Physicists Have Created a New State of Matter. With Four Electrons?
KTH Professor Egor Babaev, with aid from international collaborators, has revealed evidence of fermion quadrupling in a series of experimental measurements on the iron-based material, Ba1−xKxFe2As2.
Vadim Grinenko Egor Babaev Technische Universt Four Electrons Ermion Quadrupling New State Of Matter
Source: interestingengineering.com