Temperature controlled FFLO instability in superconductor-ferromagnet hybrids

Abstract

We show that a wide class of layered superconductor-ferromagnet (S/F) hybrids demonstrate the emergence of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase well below the superconducting transition temperature. Decreasing the temperature one can switch the system from uniform to the FFLO state which is accompanied by the damping of the diamagnetic Meissner response down to zero and also by the sign change in the curvature of the current-velocity dependence. Our estimates show that an additional layer of the normal metal (N) covering the ferromagnet substantially soften the conditions required for the predicted FFLO instability and for existing S/F/N systems the temperature of the transition into the FFLO phase can reach several kelvins.

10 pages, 8 figures, 3 tables

References in corpus (5)

• Fulde-Ferrell-Larkin-Ovchinnikov State in Heavy Fermion Superconductors
• Calorimetric Evidence for a Fulde-Ferrell-Larkin-Ovchinnikov Superconducting State in the Layered Organic Superconductor κ$-(BEDT-TTF)$_2$Cu(NCS)$_2$
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• Characteristics of superconducting tungsten silicide WxSi1-x for single photon detection
• Superfluid density of superconductor-ferromagnet bilayers

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• Finite momentum superconductivity in superconducting hybrids: Orbital mechanism
• Long-range triplet proximity effect in multiply connected ferromagnet-superconductor hybrids
• Reentrant proximity-induced superconductivity for GeTe semimetal
• Paramagnetic Meissner, vortex and 'onion' ground states in Fulde-Ferrell finite-size superconductor
• Diffusion Monte Carlo study of a spin-imbalanced two-dimensional Fermi gas with attractive interactions
• Voltage controllable superconducting state in the multi-terminal superconductor-normal metal bridge