论文标题
通过外部声子挤压增强超导性
Enhancement of superconductivity with external phonon squeezing
论文作者
论文摘要
由于在最近的一项工作中研究，因此由于与电子非线性耦合而引起的声子是一种增强超导性的方法[Kennes等。自然物理学13，479（2017）]。我们研究了在有声子抽水和额外的外部压缩的情况下研究二次电子 - 音波的相互作用。这两个驱动源之间的干扰引起了电子电子吸引力的相敏感性增强，我们发现这是增强任何玻色子介导的相互作用的通用机制。超导性最强的增强表明与驾驶引起的动态晶格不稳定性处于边界上。我们提出了几个实验平台来实现我们的计划。
Squeezing of phonons due to the non-linear coupling to electrons is a way to enhance superconductivity as theoretically studied in a recent work [Kennes et al. Nature Physics 13, 479 (2017)]. We study quadratic electron-phonon interaction in the presence of phonon pumping and an additional external squeezing. Interference between these two driving sources induces a phase-sensitive enhancement of electron-electron attraction, which we find as a generic mechanism to enhance any boson-mediated interactions. The strongest enhancement of superconductivity is shown to be on the boundary with the dynamical lattice instabilities caused by driving. We propose several experimental platforms to realize our scheme.
