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Classification and characterization of nonequilibrium Higgs modes in unconventional superconductors

Author

Listed:
  • L. Schwarz

    (Max Planck Institute for Solid State Research)

  • B. Fauseweh

    (Max Planck Institute for Solid State Research)

  • N. Tsuji

    (RIKEN Center for Emergent Matter Science (CEMS))

  • N. Cheng

    (University of British Columbia)

  • N. Bittner

    (Max Planck Institute for Solid State Research
    University of Fribourg)

  • H. Krull

    (Technische Universität Dortmund)

  • M. Berciu

    (University of British Columbia
    University of British Columbia)

  • G. S. Uhrig

    (Technische Universität Dortmund)

  • A. P. Schnyder

    (Max Planck Institute for Solid State Research)

  • S. Kaiser

    (Max Planck Institute for Solid State Research
    University of Stuttgart)

  • D. Manske

    (Max Planck Institute for Solid State Research)

Abstract

Recent findings of new Higgs modes in unconventional superconductors require a classification and characterization of the modes allowed by nontrivial gap symmetry. Here we develop a theory for a tailored nonequilibrium quantum quench to excite all possible oscillation symmetries of a superconducting condensate. We show that both a finite momentum transfer and quench symmetry allow for an identification of the resulting Higgs oscillations. These serve as a fingerprint for the ground state gap symmetry. We provide a classification scheme of these oscillations and the quench symmetry based on group theory for the underlying lattice point group. For characterization, analytic calculations as well as full scale numeric simulations of the transient optical response resulting from an excitation by a realistic laser pulse are performed. Our classification of Higgs oscillations allows us to distinguish between different symmetries of the superconducting condensate.

Suggested Citation

  • L. Schwarz & B. Fauseweh & N. Tsuji & N. Cheng & N. Bittner & H. Krull & M. Berciu & G. S. Uhrig & A. P. Schnyder & S. Kaiser & D. Manske, 2020. "Classification and characterization of nonequilibrium Higgs modes in unconventional superconductors," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-019-13763-5
    DOI: 10.1038/s41467-019-13763-5
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    Cited by:

    1. SeongJin Kwon & Hyunjin Jung & SangJin Lee & Gil Young Cho & KiJeong Kong & ChoongJae Won & Sang-Wook Cheong & Han Woong Yeom, 2024. "Dual Higgs modes entangled into a soliton lattice in CuTe," Nature Communications, Nature, vol. 15(1), pages 1-6, December.

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