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A magnetic field is generally considered to be incompatible withsuperconductivity as it tends to spin-polarize electrons and breaks apart theopposite-spin singlet superconducting Cooper pairs. Here, an experimentalphenomenon is observed that an intriguing reemergent superconductivity evolvesfrom a conventional superconductivity undergoing a hump-like intermediate phasewith a finite electric resistance in the van der Waals heterointerface oflayered NbSe2 and CrCl3 flakes. This phenomenon merely occurred when theapplied magnetic field is parallel to the sample plane and perpendicular to theelectric current direction as compared to the reference sample of a NbSe2 thinflake. The strong anisotropy of the reemergent superconducting phase is pointedto the nature of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state driven bythe strong interfacial spin-orbit coupling between NbSe2 and CrCl3 layers. Thetheoretical picture of FFLO state nodes induced by Josephson vorticescollectively pinning is presented for well understanding the experimentalobservation of the reemergent superconductivity. This finding sheds light on anopportunity to search for the exotic FFLO state in the van der Waalsheterostructures with strong interfacial spin-orbit coupling.

Strong in-plane magnetic field induced reemergent superconductivity in the van der Waals heterointerface of NbSe2 and CrCl3