Figure 1: Static and dynamic structure factors of warm dense aluminium.

(a) The ion–ion static structure factor. (b) The ion–ion dynamic structure factor at k=0.51 . The structure factors (T_e=T_i=3.5 eV and ρ=5.2 g cm⁻³), are calculated from orbital-free density functional theory (OF-DFT) simulations in a canonical ensemble with a Nosé–Hoover, Langevin and Gaussian thermostat; The Langevin thermostat uses a collision induced friction, σ, of 6 × 10¹³ s⁻¹. For comparison, results from a Kohn–Sham density functional theory (KS-DFT) simulation and a fully classical simulation using a screened Coulomb potential with an added short-range repulsion, both in a canonical ensemble with a Nosé–Hoover thermostat (dotted) are also included.