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Quantum nonlinear

  • Wednesday 3 
  • 10:50
  • - 11:20 
  • 1402 
  • Talk # 4 
  • Session # 1

Unveiling Novel Quantum States and Couplings by Coherent Phonons in Correlated Materials

Jimin Zhao1,2,3,4

  • 1- Institute of Physics, Chinese Academy of Sciences
  • 2- Beijing National Laboratory for Condensed Matter Physics
  • 3- School of Physical Sciences, Univ. of Chinese Academy of Sciences
  • 4- Songshan Lake Materials Laboratory

Presenting Author:

  • Jimin
  • Zhao

jmzhao@iphy.ac.cn

The generation and detection of coherent phonons constitute a fundamental research focus in ultrafast condensed matter physics [1]. Their ubiquitous presence in quantum materials enables the characterization of microscopic properties and the discovery of novel quantum states. In this talk, I will present our recent ultrafast pump-probe spectroscopy studies of the charge-density-wave (CDW) material 1T-TaS2. We directly detect its amplitude mode (AM) and coherent phonon modes, identifying a novel quantum state at low temperature [2]. Furthermore, we review our group’s recent work utilizing coherent phonon detection via ultrafast spectroscopy to probe emergent phenomena across diverse condensed matter systems, including topological materials [3,4,5], superconductors [6,7], correlated materials [8] and 2D materials [9].

References

N. Zhai, Jimin Zhao*, et al. Coherent phonons in correlated quantum materials. Progress in Surface Science, 100761 (2024).
Z. L. Hasaien, Jimin Zhao*, et al. Emergent quantum state unveiled by ultrafast collective dynamics in 1T-TaS2. Proceedings of the National Academy of Sciences, USA 122(9), e2406464122 (2025).
Sun, Jimin Zhao*, et al. Coherent helix vacancy phonon and its ultrafast dynamics waning in topological Dirac semimetal Cd3As2. Physical Review B, 95(23), 235108 (2017).
H. Yu Jimin Zhao*, et al. Ultrafast quasiparticle dynamics and coherent phonon in nodal line topological material LaBi. Optics Express, 28(11), 15855-15862 (2020).
Sun, Jimin Zhao*, et al. Coherent acoustic phonon and its chirping in dirac semimetal Cd3As2. Chinese Physics Letters, 35(11), 116301 (2018).
C. Tian, Jimin Zhao*, et al. Ultrafast Dynamics Evidence of High Temperature Superconductivity in Single Unit Cell FeSe on SrTiO3, Physical Review Letters, 116, 107001 (2016).
Wu, Jimin Zhao, et al. Ultrafast quasiparticle dynamics and electron-phonon coupling in (Li0.84Fe0.16) OHFe0. 98Se. Chinese Physics Letters, 37(9), 097802 (2020).
L. Hu, Jimin Zhao*, et al. Strong pseudospin-lattice coupling in Sr3Ir2O7: Coherent phonon anomaly and negative thermal expansion. Physical Review B, 99(9), 094307 (2019).
S. F. Ge, Jimin Zhao, et al. Coherent longitudinal acoustic phonon approaching THz frequency in multilayer molybdenum disulphide. Scientific reports, 4(1), 5722 (2014).