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.

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Researchers at Monash University discovered a robust 3D flat electronic band in ultrathin kagome metal films (Mn₃Sn) just three nanometers thick. This achievement, previously thought nearly impossible, combines precision thin-film growth with quantum confinement effects to lock electrons in place across all three dimensions. The breakthrough offers a scalable pathway for engineering exotic quantum states without complex artificial structures, potentially enabling future low-energy electronic technologies and unconventional superconductivity applications.

Ultrathin kagome metal hosts robust 3D flat electronic band state