Figure 3
(a) Temperature dependence of the SHG signal (ISH, blue) and correlation length of the charge order (Γ, red), estimated from the 1/3 1/3 13.5h peak width along the 0 0 Lh direction. The dotted black line at 400 K represents 3-dimensional charge order transition temperature (TCO3D). The insets labeled 3DCO and 2DCO represent 3-dimensional charge order and 2-dimensional charge order, respectively. (b) Reciprocal lattice space mapping of the superlattice diffraction near 1/3 1/3 Lh in stoichiometric YbFe2O4 at 390 K (top) and 440 K (bottom). The streaks labeled Al 111, Al 200, and Al 220 are due to diffraction from the sample holder. The colors encode the neutron intensity, with blue for low intensity and red for high intensity.
