Switching of magnetic domains reveals spatially inhomogeneous superconductivity
Switching of magnetic domains reveals spatially inhomogeneous superconductivity
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DOI：
10.1038/nphys2833
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发表时间：
2014-02-01
期刊：
影响因子：
19.6
通讯作者：
Kenzelmann, Michel
中科院分区：
文献类型：
--
作者：
Gerber, Simon;Bartkowiak, Marek;Kenzelmann, Michel
磁和电荷涨落的相互作用可以导致具有特殊电子性质的量子相。一个恰当的例子是磁驱动的超导性（1，2），其中磁关联从根本上影响潜在的对称性并产生新的物理性质。在大多数已知的磁性超导体中，超导波函数不会破坏平移对称性。然而，已经预测调制的三重态p波超导性发生在具有自旋密度波（SDW）顺序的单重态d波超导体中（3，4）。在这里，我们报告了CeColn中存在空间不均匀p波库珀对密度波的证据（5）。我们发现，SDW域可以完全切换由磁场方向的微小变化，这是自然的解释三重态超导的存在。此外，Q相出现在一个共同的磁超导量子临界点。因此，CeColn（5）的Q相代表了空间调制超导性与SDW序相关的一个例子。
The interplay of magnetic and charge fluctuations can lead to quantum phases with exceptional electronic properties. A case in point is magnetically-driven superconductivity(1,2), where magnetic correlations fundamentally affect the underlying symmetry and generate new physical properties. The superconducting wavefunction in most known magnetic superconductors does not break translational symmetry. However, it has been predicted that modulated triplet p-wave superconductivity occurs in singlet d-wave superconductors with spin-density-wave (SDW) order(3,4). Here we report evidence for the presence of a spatially inhomogeneous p-wave Cooper pair-density wave in CeColn(5). We show that the SDW domains can be switched completely by a tiny change of the magnetic field direction, which is naturally explained by the presence of triplet superconductivity. Further, the Q-phase emerges in a common magneto-superconducting quantum critical point. The Q-phase of CeColn(5) thus represents an example where spatially modulated superconductivity is associated with SDW order.