Temperature Controlled Fulde-Ferrell-Larkin-Ovchinnikov Instability in Superconductor-Ferromagnet Hybrids

Physical Review Letters
S MironovA I Buzdin

Abstract

We show that a wide class of layered superconductor-ferromagnet (S/F) hybrids demonstrates the emergence of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase well below the superconducting transition temperature. By 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 softens 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.

References

Nov 1, 1994·Physical Review. B, Condensed Matter·H Shimahara
Jan 9, 1995·Physical Review Letters·J S JiangC L Chien
Apr 6, 2001·Physical Review Letters·V V RyazanovJ Aarts
Oct 10, 2006·Physical Review Letters·V ZdravkovL R Tagirov
Jul 21, 2011·Physical Review Letters·Takehito YokoyamaNaoto Nagaosa
Sep 24, 2015·Reports on Progress in Physics·Matthias Eschrig

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Citations

Jul 6, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·P M Marychev, D Yu Vodolazov

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