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Unveiling Intrinsic Triplet Superconductivity in Noncentrosymmetric NbRe through Inverse Spin-Valve Effects

F. Colangelo1,2, M. Modestino1, F. Avitabile1, A. Galluzzi1,2, Z. Makhdoumi Kakhaki1,2, Abhishek Kumar1,2, J. Linder3, M. Polichetti1,2,4, C. Attanasio1,2,4 et al.

C. Cirillo2

Phys. Rev. Lett. 135, 226002 – Published 25 November, 2025

DOI: https://doi.org/10.1103/q1nb-cvh6

Abstract

NbRe is a noncentrosymmetric superconductor that has been proposed as a candidate for intrinsic spin-triplet pairing. However, a conclusive demonstration of triplet pairing in NbRe is yet to be found. To probe the presence of spin-triplet Cooper pairs, we fabricated Py/NbRe/Py trilayers capped with an antiferromagnetic layer. Magnetic and electrical measurements reveal an inverse spin-valve effect, which could indicate equal-spin-triplet superconductivity. The minimal sample structure and the lack of ad hoc engineered interfaces clearly associate our observation to intrinsic triplet correlations of NbRe. The availability of NbRe in thin-film form and the simplicity of the heterostructure highlight its potential as a scalable platform for superconducting spintronics.

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