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Twists and the Electronic Structure of Graphitic Materials
Tommaso Cea1, Niels R Walet2, Francisco Guinea1,2
1Imdea Nanoscience , Faraday 9 , 28015 Madrid , Spain.
Abstract:
We analyze the effect of twists on the electronic structure of configurations of infinite stacks of graphene layers. We focus on three different cases: an infinite stack where each layer is rotated with respect to the previous one by a fixed angle, two pieces of semi-infinite graphite rotated with respect to each other, and finally a single layer of graphene rotated with respect to a graphite surface. In all three cases, we find a rich structure, with sharp resonances and flat bands for small twist angles. The method used can be easily generalized to more complex arrangements and stacking sequences.
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