A team of researchers at Monash University has uncovered a powerful new way to engineer exotic quantum states, revealing a robust and tunable three-dimensional flat electronic band in an ultrathin kagome metal, an achievement long thought to be nearly impossible. The study, "3D Flat Band in Ultra-Thin Kagome Metal Mn₃Sn Film," by M. Zhao, J. Blyth, T. Yu and collaborators appears in Advanced Materials.