论文标题
列列型超导体中的半量子涡旋
Half Quantum Vortices in Nematic Superconductor
论文作者
论文摘要
由$ m_x $ bi $ _2 $ se $ _3 $的超导性激励，我们使用金茨堡 - landau理论研究了夜间超导体的拓扑激发。在低场处的孤立激发表明是扭曲的相位涡流或紧密结合的一对半量子涡旋。靠近上部关键场$ h_ {c2} $，涡旋晶格显示在极端的II型极限中始终是六边形。由于涡旋晶格状态的不同对称性，必须在$ H_ {C2} $降低外部字段时至少进行两个相变。
Motivated by the superconductivity of $M_x$Bi$_2$Se$_3$, we study topological excitations in a nematic superconductor using Ginzburg-Landau theory. An isolated excitation at low field is shown to be either a distorted phase vortex or a tightly-bounded pair of half quantum vortices. Close to upper critical field $H_{c2}$, the vortex lattice is shown to be always hexagonal in the extreme type-II limit. Due to the different symmetries of the vortex lattice states, at least two phase transitions must take place when the external field is lowered from $H_{c2}$.
