论文标题
微观成像均质和单相超流量密度$ _2 $
Microscopic imaging homogeneous and single phase superfluid density in UTe$_2$
论文作者
论文摘要
旋转三个超导体UTE $ _2 $在某些晶体中显示自发的时间反转对称性和多个超导阶段，这意味着手性超导性。在这里，我们会在ute $ _2 $的表面附近的局部磁场和磁化易感性图像，观察均质的超流体密度$ n_s $和均匀的固定涡流。 $ n_s $的温度依赖性与各向异性差距一致，并且没有证据表明在任何第二阶段过渡时期都可以预期串行。我们的发现与$ b_ {3u} $超导订单参数一致，如果是准2D fermi表面，并且没有提供$ n_s（t）$ in ute $ _2 $中多个相变的证据。
The spin-triplet superconductor UTe$_2$ shows spontaneous time-reversal symmetry breaking and multiple superconducting phases in some crystals, implying chiral superconductivity. Here we microscopically image the local magnetic fields and magnetic susceptibility near the surface of UTe$_2$, observing a homogeneous superfluid density $n_s$ and homogeneous pinned vortices. The temperature dependence of $n_s$ is consistent with an anisotropic gap and shows no evidence for an additional kink that would be expected at any second phase transition. Our findings are consistent with a dominant $B_{3u}$ superconducting order parameter in the case of a quasi-2D Fermi surface and provide no evidence for multiple phase transitions in $n_s(T)$ in UTe$_2$.
