Optical Excitation of Coherent THz Dynamics of the Rare-Earth Lattice through Resonant Pumping of f−f Electronic Transition in a Complex Perovskite DyFeO3

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Abstract
Resonant pumping of the electronic f-f transitions in the orbital multiplet of dysprosium ions (Dy^{3+}) in a complex perovskite DyFeO_{3} is shown to impulsively launch THz lattice dynamics corresponding to the B_{2g} phonon mode, which is dominanted by the motion of Dy^{3+} ions. The findings, supported by symmetry analysis and density-functional theory calculations, not only provide a novel route for highly selective excitation of the rare-earth crystal lattices but also establish important relationships between the symmetry of the electronic and lattice excitations in complex oxides.
Funding Information
  • Horizon 2020 Framework Programme
  • H2020 Marie Skłodowska-Curie Actions (861300)
  • H2020 European Research Council (856538, 101078206, 101054664)
  • Ministerie van Onderwijs, Cultuur en Wetenschap
  • MSHERF (075-03-2024-123/1)

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