AI 中文总结
本研究通过微观处理离子极化场与巡游电子的形式主义，结合简化BCS模型，推导了非中心对称金属中超导电性可与铁电性共存或由铁电性产生的条件，为相关研究提供了理论依据。
AI 中文摘要
近期实验表明，某些材料可同时呈现超导电性与铁电性，这与长期以来认为两者互不相容或至少无关联的猜想相悖。本研究采用微观层面同时处理离子极化场与巡游电子的形式主义，研究铁电金属中的超导电性。铁电序表现为自发极化，可均匀或空间调制，极化波动介导电子间相互作用，产生吸引相互作用，在特定晶格构型下可导致库珀配对，类似常规BCS理论中的非极性声子。基于简化BCS模型，推导超导电性可与铁电性共存、甚至由铁电性产生的条件。
英文摘要
It has recently been shown in experiments that certain materials can display both superconductivity and ferroelectricity, contrary to a long-standing conjecture that these two phenomena are incompatible, or at least unrelated. In this work we study superconductivity in ferroelectric metals, using a formalism of ionic polarization fields coupled to itinerant electrons, both of which are treated at the microscopic level. The ferroelectric order manifests as a spontaneous polarization that may be uniform or spatially modulated, and fluctuations of the polarization mediate interactions between the electrons. The polarization fluctuations give rise to attractive interactions that can lead to Cooper pairing in certain lattice configurations, analogous to the nonpolar phonons in conventional BCS theory. Working with a simplified BCS model, we derive conditions under which superconductivity can coexist with and even emerge from ferroelectricity.
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