Fig. 1: Host crystal structure of IrTe₂ and experimental setup.

a Side view of the trigonal 1T (spacegroup: 164) host crystal structure of IrTe₂. The layered structure of IrTe₂ with a van der Waals gap in between Te-Ir-Te layers is illustrated on the right. b Top view of the host crystal structure of IrTe₂ (a, b, and c indicate the lattice vectors). c High-pressure x-ray diffraction setup at the beamline ID27 at the European Synchrotron Radiation Facility (ESRF). The sample is placed in a diamond anvil cell mounted in an oven which can be rotated around ω. k_in and k_out are the wave vectors of the incoming and scattered photons, respectively. 2Θ is the scattering angle.