论文标题
双层，氢化和氟化石墨烯：QED与SU（2）QCD理论
Bilayer, hydrogenated and fluorinated graphene: QED vs SU(2) QCD theory
论文作者
论文摘要
通过对双层，氢化和氟化石墨烯的最新实验和计算研究，我们应用了U（1）QED（量子电动力学）和SU（2）QCD（量子染色体动力学）的形式主义。与非双立三角形晶格不同，在两部分蜂窝状晶格上总是存在单调存在，在所有显微镜对称性下都在琐碎地转换，使Dirac Spin Liquid（DSL）破坏稳定，因此可以将DSL状态连续与家长SU（2）相对于U（2）而不是U（1）估计量表。 SU（2）理论描述了一种自旋液态状态，它与通常的DSL不同，并且对于Neel或Valence-Bond固体（VBS）阶段，可能是不稳定的，除了量子临界点。这种观点意味着石墨烯系统中VBS状态的可能性。
Motivated by recent experimental and calculational investigations of bilayer, hydrogenated and fluorinated graphene, we apply the formalisms of U(1) QED (quantum electrodynamics) and SU(2) QCD (quantum chromodynamics) theories of strongly correlated state. Unlike non-bipartite triangular lattice, on bipartite honeycomb lattice there always exists a monopole that transforms trivially under all the microscopic symmetries, destabilizing the Dirac spin liquid (DSL), so that one can continuously tune the DSL state to the state with parent SU(2) instead of U(1) gauge group. The SU(2) theory describes a spin-liquid state which is different from usual DSL and is probably unstable with respect to Neel or valence-bond solid (VBS) phases, except for the quantum critical point. This point of view means a possibility of VBS states in graphene systems.
