Fig. 3: Photoinduced transient structural changes as a function of delays and laser fluence.
a Evolution of the λ-phase fraction (∆Xλ) as extracted from Rietveld refinement of the TR-powder patterns for the three types of powder pellets with different crystallite size, the block type, stripe type and flake type Ti3O5. The ∆Xλ has been normalised to its value at 0.1 ns and the time delays are represented in logarithmic scale. The error bars in ∆Xλ have been extracted from the Rietveld refinement and do not consider experimental drifts. The dashed lines are plotted using a spline interpolation of zeroth-order and indicate guides for the eyes. b The delays at which the λ-phase fraction reaches maximum are plotted as a function of crystallite sizes in the different types of pellets. The dashed line represents a power law fit. c The variation of ∆Xλ in the flake type pellet and d in the block type pellet as a function of laser fluence for few time delays, 200 ps, 100 ns and 1 µs after the photo-excitation. The curve at 200 ps is fitted with a linear function while the curves at 100 ns and 1 µs are fitted with a power law, as indicated by the dashed lines.
