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Résumé |
Strongly correlated and low-dimensional materials host exotic ground states whose out-of-equilibrium dynamics remain poorly understood and are notoriously difficult to predict from first principles. Pump-probe photoemission spectroscopy using high-harmonic-generated extreme ultraviolet pulses offers direct, momentum-resolved access to these dynamics on their natural femtosecond timescales. In this talk, we present time- and angle-resolved photoemission spectroscopy measurements shedding light on two model systems: transiently modulating the Luttinger liquid ground state in purple bronze (Li₀.₉Mo₆O₁₇), and resolving the full momentum-space exciton dynamics of the correlated van der Waals semiconductor CrSiTe₃. Finally, we discuss progress toward brighter vacuum ultraviolet sources, whose improved energy resolution and sensitivity will sharpen access to bound states and subtle spectral features in correlated materials. |
