Abstract
Flat bands in twisted layered two-dimensional materials are the key to realizing the exotic phenomena related to electron correlation. The origin of the flat bands in various twisted two-dimensional materials remains elusive. In this work, we study the coexistence of flat bands driven by localization and interference in the twisted bilayer ${\mathrm{C}}_{3}\mathrm{N}$. One ultraflat band is induced by destructive interference in the kagome arrangement of localized states. Meanwhile, other flat bands induced by simple localization exist. The effective kagome lattice with parameters tuned by twist angle is deduced. The flat band induced by interference is more robust than that induced by simple localization under vertical strain. The kagome bands formed at the bottom of the conduction band provide a platform for studying the kagome Hamiltonian in twisted two-dimensional materials.
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