具有拓扑缺陷的石墨烯的真空极化
Vacuum polarization in graphene with a topological defect
摘要：
基于紧束缚近似下的长波长连续介质模型，研究了石墨烯中拓扑缺陷对电子准粒子激发基态的影响.将石墨片卷成纳米锥的拓扑缺陷用一个具有与锥的亏损角有关的磁通量的点状赝磁涡旋表示。自伴扩张的方法被用来定义一组物理上可接受的边界条件在顶点的纳米锥。发现石墨纳米锥上的电子系统具有特殊类型的基态凝聚和电流，并确定了这些量与纳米锥的亏损角、顶点处边界条件的连续参数以及与顶点的距离的关系.
英文摘要：
The influence of a topological defect in graphene on the ground state of electronic quasiparticle excitations is studied in the framework of the long-wavelength continuum model originating in the tight-binding approximation for the nearest neighbour interaction in the graphitic lattice. A topological defect that rolls up a graphitic sheet into a nanocone is represented by a pointlike pseudomagnetic vortex with a flux which is related to the deficit angle of the cone. The method of self-adjoint extensions is employed to define the set of physically acceptable boundary conditions at the apex of the nanocone. The electronic system on a graphitic nanocone is found to acquire the ground state condensate and current of special type, and we determine the dependence of these quantities on the deficit angle of the nanocone, continuous parameter of the boundary condition at the apex, and the distance from the apex.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
