论文标题
边界铁磁性在锯齿形的石墨烯中
Boundary Ferromagnetism in Zigzag Edged Graphene
论文作者
论文摘要
长期以来一直认为具有锯齿形边缘的石墨烯的简单紧密结合格子晶格模型，长期以来一直猜想以采用铁磁构型。在这项工作中，我们证明，对于可以添加到紧密结合模型的大量相互作用的汉密尔顿人中，在扰动理论的一级方面，边缘状态的退化是以一种最大程度的方式解决了边缘状态的旋转状态，旋转j = n/2的旋转表示旋转对称性n是边缘状态n的数量。
The flat band of edge states which occur in the simple tight-binding lattice model of graphene with a zig-zag edge have long been conjectured to take up a ferromagnetic configuration. In this work we demonstrate that, for a large class of interaction Hamiltonians which can be added to the tight-binding model, and at the first order in perturbation theory, the degeneracy of the edge states is resolved in such a way that the ground state is in the maximal, spin j = N/2 representation of the spin symmetry where N is the number of edge states.
