Chiral symmetry restoration in monolayer graphene induced by Kekule distortion
Chiral symmetry restoration in monolayer graphene induced by Kekule distortion
复制标题
凯库勒畸变引起的单层石墨烯手性对称性恢复
DOI：
10.1103/physrevb.84.113402
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发表时间：
2011
影响因子：
3.7
通讯作者：
Yasufumi Araki
中科院分区：
文献类型：
--
作者：
菱川和宏、中川秀彦;他6名;Y. Araki and G. W. Semenoff;荒木康史;Yasufumi Araki;Yasufumi Araki;Yasufumi Araki
我们提出了一个手征对称性恢复机制在单层石墨烯，在类比强耦合规范理论。石墨烯的手征（亚晶格）对称性，这是自发打破下有效的强库仑相互作用，恢复通过引入外部凯库勒图案的晶格畸变。这种相变的研究分析使用强耦合展开技术的格点规范理论模型，通过保持原来的蜂窝晶格结构。讨论了手征相变与能隙振幅的关系，并给出了准粒子色散关系的修正。
We propose a chiral symmetry restoration mechanism in monolayer graphene, in analogy with the strongly coupled gauge theory. The chiral (sublattice) symmetry of graphene, which is spontaneously broken under the effectively strong Coulomb interaction, is restored by introducing the Kekulé-patterned lattice distortion externally. Such a phase transition is investigated analytically using the techniques of strong-coupling expansion on the lattice gauge theory model by preserving the original honeycomb lattice structure. We discuss the relation between the chiral phase transition and the spectral gap amplitude, and we show the modification of the dispersion relation of the quasiparticles.