arXiv 2604.015962026-04-02cond-mat.supr-con

周期驱动铁磁体/超导体异质结构中的手性超导性

Chiral Superconductivity in Periodically Driven Altermagnet/Superconductor Heterostructures

Chongqing University（重庆大学）

Xiaolin Wan, Zheng Qin, Fangyang Zhan, Junjie Zeng, Dong-Hui Xu, Rui Wang

备注：: 7 pages, 4 figures

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AI总结：

研究通过周期驱动实现铁磁体/超导体异质结构中手性拓扑超导态的转变，利用s波和s+d波配对实现可调 Chern 数的高阶拓扑超导相。

摘要：

磁性与超导性之间的相互作用为工程奇特拓扑相提供了肥沃土壤，而通过周期驱动的动力学控制提供了一种独特途径来访问静态平衡不可及的量子态。本文提出了一种策略，在周期驱动的铁磁体/超导体异质结构中实现Floquet手性拓扑超导性。我们表明，对于s波配对，系统经历从平凡到手性拓扑超导相的转变。更引人注目的是，引入混合s+d波配对后，系统可以访问具有高度可调Chern数高达N=4的Floquet手性拓扑超导相。这些奇异相归因于铁磁性、超导配对和周期驱动场的交织。本工作确立了光驱动铁磁异质结构作为探索和操控高Chern数手性拓扑超导性的多功能平台。

英文摘要：

The interplay between magnetism and superconductivity provides a fertile ground for engineering exotic topological phases, while dynamical control via periodic driving offers a unique avenue to access quantum states that are inaccessible in static equilibrium. Here, we propose a strategy to achieve the Floquet chiral topological superconductivity in an altermagnet-superconductor heterostructure driven by elliptically polarized light. We show that for $s$-wave pairing, the system undergoes a transition from a trivial to a chiral topological superconducting phase. More strikingly, with the introduction of mixed $s+d$-wave pairing, we find that the system can access Floquet chiral topological superconducting phases with highly tunable Chern numbers up to N=4. These exotic phases are attributed to the intertwining of altermagnetism, superconducting pairing, and the periodic driving field. Our work establishes the light-driven altermagnetic heterostructure as a versatile platform for exploring and manipulating high-Chern-number chiral topological superconductivity.

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