A1 Journal article (refereed)
Reducing the frequency of the Higgs mode in a helical superconductor coupled to an LC circuit (2023)

Lu, Y., Ilić, S., Ojajärvi, R., Heikkilä, T. T., & Bergeret, F. S. (2023). Reducing the frequency of the Higgs mode in a helical superconductor coupled to an LC circuit. Physical Review B, 108(22), Article 224517. https://doi.org/10.1103/PhysRevB.108.224517

JYU authors or editors

Publication details

All authors or editorsLu, Yao; Ilić, Stefan; Ojajärvi, Risto; Heikkilä, Tero T.; Bergeret, F. Sebastian

Journal or seriesPhysical Review B



Publication year2023

Publication date26/12/2023


Issue number22

Article number224517

PublisherAmerican Physical Society (APS)

Publication countryUnited States

Publication languageEnglish


Publication open accessNot open

Publication channel open access

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/93024

Web address of parallel published publication (pre-print)https://arxiv.org/abs/2212.11615


We show that the amplitude or Higgs mode of a superconductor with strong spin-orbit coupling and an exchange field, couples linearly to the electromagnetic field. Furthermore, by coupling such a superconductor to an LC resonator, we demonstrate that the Higgs resonance becomes a regular mode at frequencies smaller than the quasiparticle energy threshold 20. We finally propose and discuss a possible experiment based on microwave spectroscopy for an unequivocal detection of the Higgs mode. Our approach may allow visualizing Higgs modes also in more complicated multiband superconductors with a coupling between the charge and other electronic degrees of freedom.

Keywordssuperconductivitysuperconductorsquasiparticlesspin (quantum mechanics)resonance

Free keywordssuperconductivity; superconductors

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Related projects

Ministry reportingYes

Reporting Year2023

Preliminary JUFO rating2

Last updated on 2024-03-04 at 18:37