论文标题
埃里亚斯贝格理论中奇数超导性的障碍
Obstructions to odd-frequency superconductivity in Eliashberg theory
论文作者
论文摘要
我们提出了奇数（ODD-F）超导性（SC）的必要条件，以在Eliashberg理论描述的大量材料中发生。我们使用这种条件来证明在标准的一波段超导体中列出了奇数-F SC的出现，并与声子交换介导的配对相互作用。我们还提出了相应的无关定理，用于与自旋 - 裂开介导的相互作用的超导体。我们的结果解释了为什么Odd-f SC在常规材料中很少见，并且它们为搜索具有相互作用的材料的可能性打开了可能允许奇数-F SC的材料。
We present a necessary condition for odd-frequency (odd-f) superconductivity (SC) to occur in a large class of materials described by Eliashberg theory. We use this condition to prove a no-go theorem ruling out the occurrence of odd-f SC in standard one-band superconductors with pairing interactions mediated by phonon exchange. We also present a corresponding no-go theorem for superconductors with interactions mediated by spin-fluctuations. Our results explain why odd-f SC is rare in conventional materials, and they open up the possibility for a search for materials with interactions designed so as to allow for odd-f SC.
