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Coupling the Higgs mode and ferromagnetic resonance in spin-split superconductors with Rashba spin-orbit coupling

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arxiv 2108.06202 v2 pith:DQYA6BRK submitted 2021-08-13 cond-mat.supr-con cond-mat.mes-hall

Yao Lu , Risto Ojajärvi , P. Virtanen , M.A. Silaev , Tero T. Heikkilä This is my paper
classification cond-mat.supr-concond-mat.mes-hall
keywords couplingeffectspinferromagnetichiggsmoderashbaspin-orbit
verification ladder T0 review T1 audit T2 compute T3 formal
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We consider the Higgs mode at nonzero momentum in superconductors and demonstrate that in the presence of Rashba spin-orbit coupling, it couples linearly with an external exchange field. The Higgs-spin coupling dramatically modifies the spin susceptibility near the superconducting critical temperature and consequently enhances the spin pumping effect in a ferromagnetic insulator/superconductor bilayer system. We show that this effect can be detected by measuring the magnon-induced voltage generated by the inverse spin Hall effect.

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