Fig. 3: High-pressure XRD of La2O3Fe2Se2.
From: Pressure-induced transition from a Mott insulator to a ferromagnetic Weyl metal in La2O3Fe2Se2
a XRD patterns of La2O3Fe2Se2 polycrystal under high pressure up to 85.8 GPa with an incident wavelength λ = 0.6199 Å. No structural phase transition is detected. b Pressure dependence of the lattice parameters a and c for La2O3Fe2Se2. c The derived cell volume as a function of pressure for La2O3Fe2Se2. The black dashed line is a fitted curve by the Birch-Murnaghan equation of state with the derived bulk modulus B0 = 73.9 GPa. The inset shows the pressure dependence of the c/a ratio which shows an anomaly ~40 GPa, close to the insulator-metal transition.
