Journal article
Higgs mode stabilization by photoinduced long-range interactions in a superconductor
- Abstract:
- We show that low-lying excitations of a 2D Bardeen-Cooper-Schrieffer superconductor are significantly altered when coupled to an externally driven cavity, which induces controllable long-range attractive interactions between the electrons. We find that they combine nonlinearly with intrinsic local interactions to increase the Bogoliubov quasiparticle excitation energies, thus enlarging the superconducting gap. The long-range nature of the driven-cavity-induced attraction qualitatively changes the collective excitations of the superconductor. Specifically, they lead to the appearance of additional collective excitations of the excitonic modes. Furthermore, the Higgs mode is pushed into the gap and now lies below the Bogoliubov quasiparticle continuum such that it cannot decay into quasiparticles. This way, the Higgs mode's lifetime is greatly enhanced.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Accepted manuscript, 2.5MB, Terms of use)
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- Publisher copy:
- 10.1103/PhysRevB.104.L140503
Authors
- Publisher:
- American Physical Society
- Journal:
- Physical Review B More from this journal
- Volume:
- 104
- Issue:
- 14
- Article number:
- L140503
- Publication date:
- 2021-10-12
- Acceptance date:
- 2021-09-28
- DOI:
- EISSN:
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2469-9969
- ISSN:
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2469-9950
- Language:
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English
- Keywords:
- Pubs id:
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1205702
- Local pid:
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pubs:1205702
- Deposit date:
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2021-11-25
Terms of use
- Copyright holder:
- American Physical Society
- Copyright date:
- 2021
- Rights statement:
- © 2021 American Physical Society
- Notes:
- This is the accepted manuscript version of the article. The final version is available online from American Physical Society at: https://doi.org/10.1103/PhysRevB.104.L140503
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