MOIRÉ

LITStack two graphene sheets and twist one. At about 1.1°, the first "magic" angle, the electronic bands near zero energy go flat. Cao et al. (Nature, 2018) found correlated insulators at half filling and superconductivity up to 1.7 K in this twisted bilayer graphene. The superlattice period is L = a / (2 sin(θ/2)), with graphene's lattice constant a ≈ 0.246 nm.

COMPUTEDTwo luminous honeycombs, one rotating. The large hexagonal moiré pattern emerges from the overlap; its period is computed live, and the magic-angle mark shows where Cao's flat bands live. Drag horizontally to twist.

θ snap to 1.1°

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