Twistable electronics with dynamically rotatable heterostructures

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Abstract
Controlling two-dimensional twist: In heterostructures assembled from two-dimensional materials such as graphene, electron tunneling between layers varies strongly with the rotation angle between the crystal lattices. Usually, the twist angle between layers is fixed after assembly. Ribeiro-Palau et al. encapsulated graphene with boron nitride, but the top boron nitride flake was shaped so that an atomic force microscope tip could push on it to vary the twist angle by as little as 0.2°. They observed variations with twist angle in properties such as the charge neutrality point, which would be difficult to observe in static rotated structures. Science , this issue p. 690
Funding Information
  • National Science Foundation (DMR-1462383)
  • National Science Foundation (DMR-1420634)

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