Attosecond Time-Domain Measurement of Core-Level-Exciton Decay in Magnesium Oxide
Attosecond Time-Domain Measurement of Core-Level-Exciton Decay in Magnesium Oxide
Excitation of ionic solids with extreme ultraviolet pulses creates localized core-excitons, which in some cases couple strongly to the lattice. Here, core-excitonic states of magnesium oxide are studied in the time domain at the Mg $\text{L}_{2,3}$ edge with attosecond transient reflectivity spectroscopy. Attosecond pulses trigger the excitation of these short-lived …