消失迈斯纳效应是超导-铁磁层状系统面内FFLO不稳定性的标志
Vanishing Meissner effect as a hallmark of in-plane FFLO instability in superconductor - ferromagnet layered systems
摘要：
我们证明，在广泛的多层超导体-铁磁结构中（例如，S/F、S/F/N和S/F/F '）时，迈斯纳效应的消失标志着面内Fulde-Ferrell-Larkin-Ovchinnikov（FFLO）调制超导相的出现。与体超导体相反，在这些系统中的FFLO不稳定性可以在接近临界温度下出现，并且有效地由S层厚度和F/F'双层中的磁化矢量之间的角度控制。预测的FFLO状态通过临界温度与垂直磁场分量的振荡揭示。
英文摘要：
We demonstrate that in a wide class of multilayered superconductor - ferromagnet structures (e.g., S/F, S/F/N and S/F/F') the vanishing Meissner effect signals the appearance of the in-plane Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) modulated superconducting phase. In contrast to the bulk superconductors the FFLO instability in these systems can emerge at temperatures close to the critical one and is effectively controlled by the S layer thickness and the angle between magnetization vectors in the F/F' bilayers. The predicted FFLO state reveals through the critical temperature oscillations vs the perpendicular magnetic field component.
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