标题： 量子几何诱导的哈德纳相中的凯库勒超导性 显示英文标题

标题： Quantum Geometry Induced Kekulé Superconductivity in Haldane phases

摘要： 手性二维电子气体，捕捉了石墨烯和菱形石墨烯系统的电子特性，表现出奇异的动量空间涡旋，并容易受到相互作用引起的拓扑哈德纳相的影响。 在这里，我们研究手性二维电子气体的反演对称哈德纳相中的配对相互作用。 我们证明哈德纳相的非平凡带拓扑相对于谷间（${\bf Q} = 0$）配对倾向，增强了谷内（${\bf Q} = \pm 2 {\bf K_D}$）配对倾向，促进了晶格尺度的配对密度波序的出现。 当纵向声学声子介导配对相互作用时，系统支持手性凯库勒超导序。 我们的发现与菱形石墨烯和凯格米金属中的超导性有关。 显示英文摘要

摘要： Chiral two-dimensional electron gases, which capture the electronic properties of graphene and rhombohedral graphene systems, exhibit singular momentum-space vortices and are susceptible to interaction-induced topological Haldane phases. Here, we investigate pairing interactions in these inversion-symmetric Haldane phases of chiral two-dimensional electron gases. We demonstrate that the nontrivial band topology of the Haldane phases enhances intra-valley (${\bf Q} = \pm 2 {\bf K_D}$) pair susceptibility relative to inter-valley (${\bf Q} = 0$) pair susceptibility, favoring the emergence of a lattice-scale pair-density wave order. When longitudinal acoustic phonons mediate the pairing interaction, the system supports a chiral Kekul\`{e} superconducting order. Our findings are relevant to superconductivity in rhombohedral graphene and Kagome metals.