论文标题
手性p波超导体中C轴域壁上的半量子涡
Half-quantum vortices on c-axis domain walls in chiral p-wave superconductors
论文作者
论文摘要
手性超导体是两倍变化，相反手性的结构域可以形成，被域壁隔开。有迹象表明在准二维手性手性$ p $ - 波超导体SR $ _2 $ ruo $ _4 $中，有这种域形成，但是没有实验在此材料中明确解决了单个域。在这项工作中，从理论的角度探索了与手性$ p $ - 波 - 波超导体平行的$ c $轴域墙。首先，使用现象学的金茨堡 - 兰道（Ginzburg-landau）和一般的Bogoliubov-Degennes方法，可以获得对域壁结构的一致定性描述。尽管这些域在各向同性极限中被解耦，但各向异性系统中存在有限的耦合，并且域壁可以视为有效的约瑟夫森交界处。在第二部分中，讨论了此类$ C $轴域壁上半量子涡流（HQV）的形成和结构。
Chiral superconductors are two-fold degenerate and domains of opposite chirality can form, separated by domain walls. There are indications of such domain formation in the quasi two-dimensional putative chiral $p$-wave superconductor Sr$_2$RuO$_4$, yet no experiment has explicitly resolved individual domains in this material. In this work, $c$-axis domain walls lying parallel to the layers in chiral $p$-wave superconductors are explored from a theoretical point of view. First, using both a phenomenological Ginzburg-Landau and a quasiclassical Bogoliubov-deGennes approach, a consistent qualitative description of the domain wall structure is obtained. While these domains are decoupled in the isotropic limit, there is a finite coupling in anisotropic systems and the domain wall can be treated as an effective Josephson junction. In the second part, the formation and structure of half-quantum vortices (HQV) on such $c$-axis domain walls are discussed.
