Borroni, S.Tucker, G. S.Stuhr, U.Lorenzana, J.Ronnow, H. M.Carbone, F.2020-03-032020-03-032020-03-032020-02-1410.1103/PhysRevB.101.054303https://infoscience.epfl.ch/handle/20.500.14299/166787WOS:000513579000001We study the dynamics and interactions of the critical fluctuations of the Verwey transition in magnetite (Fe3O4) in the pretransition region by means of inelastic neutron scattering experiments on a natural single crystal. We find that a Delta(5) mode interacts strongly with a central peak of order parameter fluctuations, whose width is determined by the order parameter coherence time. This is compared with pump-probe experiments, which we formerly explained in terms of fluctuation-assisted stimulated Raman scattering. Our estimates of the order parameter correlation time from experiments in the energy domain (inelastic neutron scattering experiments) and in the time domain (pump-probe experiments) coincide, thus giving further credit to our previous interpretation of pump-probe experiments and confirming that the Verwey transition is of the order-disorder type, without phonon softening.Materials Science, MultidisciplinaryPhysics, AppliedPhysics, Condensed MatterMaterials SciencePhysicsneutron diffuse-scatteringphasetext::journal::journal article::research article