Time- and angle-resolved photoemission spectroscopy (trARPES) data of Td-MoTe2 across an ultrafast dynamical Lifshitz transition

Time and angle-resolved photoemission spectroscopy (ARPES) of bulk Td-MoTe₂ for p-polarized pump and probe. This dataset, measured at an absorbed fluence of 0.6 mJ/cm², demonstrates the occurence of an abrupt change in the Fermi surface topology, also called Lifshitz transition. These results supplement a manuscript unveiling a nonequilibrium dynamical route toward ultrafast modification of the Fermi surface topology, experimentally demonstrated here for the first time. The combination of these measurements with state-of-the-art TDDFT+U simulations demonstrates that this nonequilibrium topological electronic transition finds its microscopic origin in the dynamical modification of the effective electronic correlations.