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Tri and tri again

Monolayer graphene is a semimetal with no bandgap, and bilayer graphene is a semiconductor with a tunable gap. A trio of studies now shows that trilayer graphene can be either, depending on how its layers are stacked — behaviour that could support exotic new electronic states.

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Figure 1: Unlike monolayer and bilayer graphene, there are multiple ways of stacking three or more layers of graphene.


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Correspondence to Amir Yacoby.

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Yacoby, A. Tri and tri again. Nature Phys 7, 925–926 (2011).

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