Comunicazione
Signatures of superconducting proximity effects in (2D) (S/F) bilayers with a helimagnetic metal superconductor/ferromagnet.
Spuri A., Nikolic D., Chakraborty S., Belzig W., Scheer E., Di Bernardo A., Steinberg H., Millo O., Klang M., Mandrus D.
Several studies performed on three-dimensional (3D) superconductor/ferromagnet (S/F) structures have shown that a viable route to generate fully spin-polarized ($i.e.$, spin-triplet) superconducting states consists in using F materials with an intrinsically inhomogeneous magnetization. We have fabricated 2D S/F bilayers consisting of $Cr_{1/3}NbS_{2}$ (a F with a magnetically inhomogeneous ground state) stacked via van der Waals interactions onto $NbS_{2}$ (2D S) and we have characterized their low-temperature magnetotransport properties to find evidence for spin-triplet states. Our results demonstrate strong evidence for a superconducting proximity effect occurring in the $Cr_{1/3}NbS_{2}/NbS_{2}$ system which manifests through the emergence of $H-tunable$ reentrant resistive states below the superconducting transition of the bilayers and through a non-monotonic variation of the superconducting critical temperature ($T_{c}$) with the applied $H$. The latter result is possibly consistent with the generation of long-ranged spin-triplet pairs at the $NbS_{2}/Cr_{1/3}NbS_{2}$ interface.