Models of Strong Interaction in Flat-Band Graphene Nanoribbons: Magnetic Quantum Crystals

Details Models of Strong Interaction in Flat-Band Graphene Nanoribbons: Magnetic Quantum Crystals Models of Strong Interaction in Flat-Band Graphene Nanoribbons: Magnetic Quantum Crystals

2011-07-30

arxiv.org/abs/1108.0088v2

Phys. Rev. B 85, 075438 (2012)

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages, 6 figures, 4 tables

Scientific paper

10.1103/PhysRevB.85.075438

Graphene 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.

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