Wang, H.Scarola, Vito W.2017-02-202017-02-202012-02-291098-0121http://hdl.handle.net/10919/75088Graphene based nanostructures exhibit flat electronic energy bands in their single-particle spectrum. We consider interacting electrons in flat bands of zig-zag nanoribbons. We present a protocol for flat-band projection that yields interaction-only tight-binding models. We argue that, at low densities, flat bands can delocalize single-particle basis states to support ferromagnetic quantum crystal ground states.8 pagesIn CopyrightPhysics, Condensed MatterPhysicsWANNIER FUNCTIONSPOINT-DEFECTSFERROMAGNETISMEDGESTATEArticle - Refereedhttps://doi.org/10.1103/PhysRevB.85.075438857Scarola, VW [0000-0002-8653-2723]