论文标题
沮丧的超导性和六重命令
Frustrated superconductivity and sextetting order
论文作者
论文摘要
超导状态通常有利于类似于铁磁性的均匀空间分布。然而，配对波状状态在配对顺序中表现出符号变化，从而导致相干性的潜在挫败感。我们提出了一种机制，以归因于配对波状状态相干性的挫败感，其空间调制表现出涡旋 - antovortex-antovortex-antovortex-anterex-andovortex蜂蜜。经典的基态构型映射到百特的三色模型，揭示了宏观的退化，并伴有广泛的熵。相干问题交织在一起的U（1）阶段和涡度变量。尽管所得的颜色和相位波动抑制了配对密度波的顺序，但它们在超导过渡温度（$ t _ {\ text {c}} $）上方维持了六重顺序。 $ 1/3 $ - 分离的涡旋作为六重命令中的基本拓扑缺陷出现。这种沮丧的超导性的新型机制为CSV $ _3 $ SB $ _5 $中的实验性观察到的分数振荡提供了另一种解释。
The superconducting state typically favors a uniform spatial distribution akin to ferromagnetism. Nevertheless, the pair-density-wave state exhibits sign changes in the pairing order, leading to potential frustrations in phase coherence.We propose a mechanism to the sextetting order stemming from the frustrations in the phase coherence of a pair-density-wave state, whose spatial modulation manifests a vortex-antivortex honeycomb lattice. The classical ground state configurations are mapped to Baxter's three-coloring model, revealing a macroscopic degeneracy accompanied by extensive entropy. The phase coherence problem intertwines the U(1) phases and the vorticity variables. While the resultant color and phase fluctuations suppress the pair-density-wave order, they maintain the sextetting order above the superconducting transition temperature ($T_{\text{c}}$). The $1/3$-fractional vortex emerges as the fundamental topological defect in the sextetting order. This novel mechanism of frustrated superconductivity provides an alternative explanation for the experimental observed fractional oscillations in CsV$_3$Sb$_5$.
