arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1010.5876cond-mat.str-elhep-lathep-ph
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石墨烯的手征对称性与强耦合格点规范理论

Chiral symmetry of graphene and strong coupling lattice gauge theory

Yasufumi Araki, Tetsuo Hatsuda

摘要:

我们分别用紧致和非紧致U(1)格点规范理论对单层石墨烯上的电子进行了模型化。该系统进行了分析的强耦合扩展,并被证明是一个绝缘体,由于动态间隙形成/周围的强耦合限制。这类似于强耦合规范理论中的自发手征对称性破缺。从紧凑和非紧凑的配方的结果进行了比较,下一个领导的强耦合扩展的顺序。还研究了绝缘相中的激子模及其色散关系:发现出现了服从Gell-Mann-Oakes-Renner型公式的伪Nambu-Goldstone模。

英文摘要:

We model the electrons on a monolayer graphene in terms of the compact and non-compact U(1) lattice gauge theories. The system is analyzed by the strong coupling expansion and is shown to be an insulator due to dynamical gap formation in/around the strong coupling limit. This is similar to the spontaneous chiral symmetry breaking in strong coupling gauge theories. The results from the compact and non-compact formulations are compared up to the next-to-leading order of the strong coupling expansion. Excitonic modes and their dispersion relations in the insulating phase are also investigated: it is found that there arises a pseudo-Nambu--Goldstone mode obeying the Gell-Mann--Oakes--Renner type formula.

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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