For 30 degree twisted double bilayer graphene, low-energy electrons are confined to individual bilayers, while at Q points interlayer coupling creates new van Hove singularities, optical peaks, and 12-fold-symmetry-like charge states.
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Electronic structure of 30{\deg} twisted double bilayer graphene
For 30 degree twisted double bilayer graphene, low-energy electrons are confined to individual bilayers, while at Q points interlayer coupling creates new van Hove singularities, optical peaks, and 12-fold-symmetry-like charge states.