Tunable field-linked s-wave interactions in dipolar fermi mixtures Li, Jinglun Koutentakis, Georgios Hrast, Mateja Lemeshko, Mikhail ; https://orcid.org/0000-0002-6990-7802 Schindewolf, Andreas Al Hyder, Ragheed ddc:530 Spin mixtures of degenerate fermions are a cornerstone of quantum many-body physics, enabling superfluidity, polarons, and rich spin dynamics through s-wave scattering resonances. Combining them with strong, long-range dipolar interactions provides highly flexible control schemes promising even more exotic quantum phases. Recently, microwave shielding gave access to spin-polarized degenerate samples of dipolar fermionic molecules, where tunable p-wave interactions were enabled by field-linked resonances available only by compromising the shielding (due to experimental limitations). Here, we study the scattering properties of a fermionic dipolar spin mixture and show that a universal s-wave resonance is readily accessible without compromising the shielding. We develop a universal description of the tunable s-wave interaction and weakly bound tetratomic states based on the microwave-field parameters. The s-wave resonance paves the way to stable, controllable and strongly-interacting dipolar spin mixtures of deeply degenerate fermions and supports favorable conditions to reach this regime via evaporative cooling. Springer Nature 2026 info:eu-repo/semantics/article doc-type:Article Article http://purl.org/coar/resource_type/c_2df8fbb1 https://research-explorer.ista.ac.at/record/22100 https://research-explorer.ista.ac.at/download/22100/22133 Li J, Koutentakis G, Hrast M, Lemeshko M, Schindewolf A, Al Hyder R. Tunable field-linked s-wave interactions in dipolar fermi mixtures. <i>Communications Physics</i>. 2026;9. doi:<a href="https://doi.org/10.1038/s42005-026-02578-8">10.1038/s42005-026-02578-8</a> eng info:eu-repo/semantics/altIdentifier/doi/10.1038/s42005-026-02578-8 info:eu-repo/semantics/altIdentifier/e-issn/2399-3650 info:eu-repo/semantics/altIdentifier/arxiv/2506.23318 info:eu-repo/semantics/openAccess