Correlated insulator in the kagome flat band of a two-dimensional electrostatic crystal
Oleh Klochan
Nature Physics, Published online: 11 May 2026; doi:10.1038/s41567-026-03291-7 A tunable artificial crystal in a shallow GaAs quantum well is shown to enable interaction-driven insulating behaviour. Electrostatic control tunes the band structure from graphene-like to kagome-like bands.