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arXiv 1006.0791cond-mat.mes-hallmath-phmath.MP
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石墨烯手征规范理论中的拓扑涡旋

Topological Vortices in Chiral Gauge Theory of Graphene

Xin Liu, Ruibin Zhang

摘要:

导电带和价带之间能隙的产生机制是石墨烯材料研究的核心。最近Chamon,Jackiw等人提出了一种利用Kekulé畸变背景场$% φ$及其诱导规范势$A_{i}$产生能隙的机制。本文研究了该模式中固有的各种涡结构。将$φ$视为一般的背景场而非固定的Nielson-Oleson型分布,从势$A_{i}$的内部结构出发,在石墨烯表面发现了两种新的涡--速度场涡和运动诱导涡.这些涡旋结构自然地产生于狄拉克费米子的运动,而不是背景畸变场。

英文摘要:

Generation mechanism of energy gaps between conductance and valence bands is at the centre of the study of graphene material. Recently Chamon, Jackiw, et al. proposed a mechanism of using a Kekulé distortion background field $% φ$ and its induced gauge potential $A_{i}$ to generate energy gaps. In this paper various vortex structures inhering in this model are studied. Regarding $φ$ as a generic background field rather than a fixed Nielson-Oleson type distribution, we have found two new types of vortices on the graphene surface --- the velocity field vortices and the monopole-motion induced vortices --- from the inner structure of the potential $A_{i}$. These vortex structures naturally arise from the motion of the Dirac fermions instead of from the background distortion field.

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。

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