论文标题
在两个组成型超导体上方的正常阶段，没有金茨堡 - 兰道机制
The absence of Ginzburg-Landau mechanism for vestigial order in the normal phase above a two-component superconductor
论文作者
论文摘要
两个组分的超导体可以假设地支持超过其超导过渡温度的残留阶阶段，而旋转或时间转换对称性自发断裂，而保持不渗透。这已被建议用来解释列明超导体$ m_x $ bi $ _2 $ _2 $ se $ _3 $的观察到的正常状态nematicity。我们研究了该遗迹顺序在金茨堡 - 兰道理论中发生的条件，并在该理论的列表和手性方面都具有顺序参数波动。与先前的理论结果相反，我们排除了可能的遗迹顺序的大部分参数空间。我们认为，非常极端各向异性是稳定遗传阶段的先决条件，在实际材料中可能无法满足。
A two-component superconductor may hypothetically support a vestigial order phase above its superconducting transition temperature, with rotational or time-reversal symmetry spontaneously broken while remain non-superconducting. This has been suggested as an explanation to the observed normal state nematicity of the nematic superconductor $M_x$Bi$_2$Se$_3$. We examine the condition for this vestigial order to occur within Ginzburg-Landau theory with order parameter fluctuations, on both the nematic and chiral sides of the theory. Contrary to prior theoretical results, we rule out a large portion of parameter space for possible vestigial order. We argue that very extreme anisotropy is one prerequisite for a stable vestigial phase, which is likely not met in real materials.
