Models of strong interaction in flat-band graphene nanoribbons: Magnetic quantum crystals
Models of strong interaction in flat-band graphene nanoribbons: Magnetic quantum crystals
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DOI：
10.1103/physrevb.85.075438
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发表时间：
2011-07
影响因子：
3.7
通讯作者：
Hao Wang;V. Scarola
中科院分区：
文献类型：
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作者：
Hao Wang;V. Scarola
石墨烯基纳米结构在其单粒子光谱中表现出平坦的电子能带。我们考虑在锯齿形纳米带的平带相互作用的电子。我们提出了一个协议的平带投影，产生相互作用的紧束缚模型。我们认为，在低密度下，平带可以使单粒子基态离域，以支持铁磁量子晶体基态。
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.