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arXiv · 2605.10139

Superconductivity Mediated Long Range Magnetic Coupling

Ming Yan Wang·Yi Liu·Yao Lu
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Abstract

We investigate a Rashba superconductor thin film coupled to overlaying ferromagnetic insulators (FIs). We show that the ferromagnetic insulators generate circular super-currents, enabling long-range magnetic interactions (LRMI), decaying in power laws. In the static case, the long-range magnetic interaction can be ferromagnetic, in contrast to previous studies showing that superconductor mediates anti-ferromagnetic interactions decaying exponentially. Surprisingly, we find that in the dynamic case, the LRMI has a different distance dependence. Our results have potential applications in superconducting spintronics.

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Ming Yan Wang, Yi Liu, Yao Lu. 2026-05-11. Superconductivity Mediated Long Range Magnetic Coupling. https://arxiv.org/abs/2605.10139

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