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

F. Colangelo, M. Modestino, F. Avitabile, A. Galluzzi, Z. Makhdoumi Kakhaki, Abhishek Kumar, J. Linder, M. Polichetti, C. Attanasio, C. Cirillo

DOI 10.1103/q1nb-cvh6 · Physical Review Letters

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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.

Source-reported materials — not catalogue approval

FormulaReported Tc (K)Pressure (GPa)Type
Nb0.18Re0.82

Archive — visibility unverified

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9Pressure not reportedunknown
Nb0.18Re0.82

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Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.

6.8Pressure not reportedunknown
Nb0.18Re0.82

Archive — visibility unverified

Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.

2.9Pressure not reportedmidpoint

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