1206.5488 (S. Mironov et al.)

Vanishing Meissner effect as a hallmark of in-plane FFLO instability in
superconductor - ferromagnet layered systems    [PDF]

S. Mironov, A. Mel'nikov, A. Buzdin

A wide class of multilayered superconductor - ferromagnet structures (e.g., S/F, S/F/N and S/F/F') is shown to reveal the in-plane Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) instability resulting in formation of the order parameter profile modulated along the layers. The switching between the uniform and FFLO states is identified by the vanishing Meissner effect and can be 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.

View original: http://arxiv.org/abs/1206.5488