First-principles modeling of plasmons in aluminum under ambient and extreme conditions

The theoretical understanding of plasmon behavior is crucial for an accurate interpretation inelastic scattering diagnostics in many experiments. We highlight the utility linear response time-dependent density functional theory (LR-TDDFT) as a first-principles framework consistently modeling properties. provide comprehensive analysis plasmons aluminum from ambient to warm dense matter conditions and assess typical properties such dynamical structure factor, dispersion, lifetime. compare our results with measurements other TDDFT well models random phase approximation, Mermin approach, dielectric function obtained using static local field corrections uniform electron gas parametrized path-integral Monte Carlo simulations. conclude that dispersion lifetime are inconsistent between experiment theories common practice extracting studying relations insufficient procedure capture complicated physics contained dynamic factor its full breadth.