Science Advances

Supplementary Materials

This PDF file includes:

  • Section S1. Experimental methods
  • Section S2. Sample preparation
  • Section S3. Diffraction pattern of IrTe2
  • Section S4. Dynamics on the Bragg and superlattice peaks
  • Section S5. Thickness dependence of lattice dynamics for Bragg and superlattice peaks
  • Section S6. Power dependence of lattice and electron dynamics
  • Section S7. DFT calculations
  • Section S8. Lattice temperature increases with the fluence of pump pulse
  • Fig. S1. Schematic diagram of the FED setup.
  • Fig. S2. Thin films and the TEM image.
  • Fig. S3. Delay time dependence of diffraction pattern.
  • Fig. S4. Lattice dynamics obtained from several BPs and SLs.
  • Fig. S5. Relative diffraction intensity change of IrTe2 with different film thicknesses of 20 to 100 nm.
  • Fig. S6. Fluence dependence of FED and optical pump-probe experiments.
  • Fig. S7. Difference of electronic free energies of dimerized and HT structures as a function of electronic temperature, as calculated using DFT.
  • Fig. S8. Calculated forces on Ir ions after optical excitation.
  • Fig. S9. Calculated forces on the Ir ions in the dimerized structure after an instantaneous optical excitation.
  • Fig. S10. DOS contributions from the Ir ions.
  • References (3032)

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