AI 中文总结
研究方形晶格超导体与复合电荷密度波共存情况，通过实键和虚键调制协同作用，驱动系统进入两个拓扑非平凡超导相，低温热霍尔电导率有量子化平台，确立方形晶格为设计拓扑超导性的原始平台。
AI 中文摘要
电荷序与超导性之间的相互作用为新兴量子相提供了丰富的基础。在此，我们从理论上研究了一种与复合电荷密度波（CDW）共存的方形晶格超导体，该复合电荷密度波由打破时间反演对称性的实键调制（电荷键序，CBO）和虚跳跃调制（手性通量相，CFP）组成。我们发现，虽然单独的CFP不会在方形晶格中诱导拓扑，但它与CBO共存会将系统驱动到具有陈数\(C = +2\)和\(C = -2\)的两个拓扑非平凡超导相。低温热霍尔电导率\(\kappa_{xy}\)表现出与陈数成比例的量子化平台，提供了明确的实验特征。我们的结果将方形晶格确立为通过实键和虚键调制协同作用来设计拓扑超导性的原始平台。
英文摘要
The interplay between charge order and superconductivity offers a fertile ground for emergent quantum phases. Here we theoretically investigate a square-lattice superconductor coexisting with a composite charge density wave (CDW) consisting of a real bond modulation (charge bond order, CBO) and an imaginary hopping modulation (chiral flux phase, CFP) that breaks time-reversal symmetry. We uncover that, while CFP alone does not induce topology in square lattices, its coexistence with CBO drives the system into two topologically nontrivial superconducting phases with Chern numbers $C=+2$ and $C=-2$. The low-temperature thermal Hall conductivity $κ_{xy}$ exhibits quantized plateaus proportional to the Chern number, providing a clear experimental fingerprint. Our results establish the square lattice as a pristine platform for engineering topological superconductivity through the synergy of real and imaginary bond modulations.
Comments9 pages, 5 figures
