Dynamical interplay between superconductivity and charge density waves: A nonlinear terahertz study of coherently driven 2H-NbSe2

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Liwen Feng - , Institute of Solid State and Materials Physics, Shanghai Jiao Tong University, Max Planck Institute for Solid State Research, University of Stuttgart (Author)
  • Jiayuan Cao - , Shanghai Jiao Tong University (Author)
  • Tim Priessnitz - , Max Planck Institute for Solid State Research (Author)
  • Yunyun Dai - , Beijing Institute of Technology (Author)
  • Thales de Oliveira - , Helmholtz-Zentrum Dresden-Rossendorf (Author)
  • Jiayu Yuan - , Peking University (Author)
  • Ryosuke Oka - , Max Planck Institute for Solid State Research (Author)
  • Min-Jae Kim - , Institute of Solid State and Materials Physics, Max Planck Institute for Solid State Research, University of Stuttgart (Author)
  • Min Chen - , Helmholtz-Zentrum Dresden-Rossendorf (Author)
  • Alexey N. Ponomaryov - , Helmholtz-Zentrum Dresden-Rossendorf (Author)
  • Igor Ilyakov - , Helmholtz-Zentrum Dresden-Rossendorf (Author)
  • Haotian Zhang - , Shanghai Jiao Tong University (Author)
  • Yongbo Lv - , Shanghai Jiao Tong University (Author)
  • Valentina Mazzotti - , Max Planck Institute for Solid State Research, Dresden University of Technology (Author)
  • Gideok Kim - , Max Planck Institute for Solid State Research (Author)
  • Georg Christiani - , Max Planck Institute for Solid State Research (Author)
  • Gennady Logvenov - , Max Planck Institute for Solid State Research (Author)
  • Dong Wu - , Beijing Academy of Quantum Information Sciences (Author)
  • Yuan Huang - , Beijing Institute of Technology (Author)
  • Jan Christoph Deinert - , Helmholtz-Zentrum Dresden-Rossendorf (Author)
  • Sergey Kovalev - , Helmholtz-Zentrum Dresden-Rossendorf (Author)
  • Stefan Kaiser - , Institute of Solid State and Materials Physics, Max Planck Institute for Solid State Research, University of Stuttgart (Author)
  • Tao Dong - , Peking University (Author)
  • Nanlin Wang - , Peking University (Author)
  • Hao Chu - , Shanghai Jiao Tong University, Max Planck Institute for Solid State Research (Author)

Abstract

Formula Presented is an archetypal system in which superconductivity and charge density wave (CDW) coexist and compete macroscopically with each other. In particular, this interplay also manifests in their dynamical fluctuations. As a result, the superconducting amplitude fluctuation (i.e., Higgs mode) is pushed below the quasiparticle continuum, allowing it to become a coherent excitation observable by Raman scattering. In the present study, we coherently drive the collective oscillations of the two orders and visualize their interplay in the time domain. We find that both collective modes contribute to terahertz third-harmonic generation (THG) and their THG signals interfere below Formula Presented, leading to an antiresonance of the integrated THG signal. The dynamical Ginzburg-Landau model suggests that around the antiresonance a periodic energy transfer between the driven Higgs oscillations and the driven CDW oscillations is possible. Our results illustrate the roles of collective modes in the terahertz THG process, revealing a close connection of this technique to Raman scattering. In systems where the different collective modes are coupled, our experimental scheme also illustrates a paradigm for realizing coherent control via such couplings.

Details

Original languageEnglish
Article numberL100504
JournalPhysical Review B
Volume108
Issue number10
Publication statusPublished - 1 Sept 2023
Peer-reviewedYes

External IDs

ORCID /0000-0001-9862-2788/work/145699093