We investigate shock-compressed copper in the warm dense matter regime by means of density functional theory molecular dynamics simulations. We use neural-network-driven interatomic potentials to increase the size of the simulation box and extract thermodynamic properties in the hydrodynamic limit. We show the agreement of our simulation results with experimental data for solid copper at ambient conditions and liquid copper near the melting point under ambient pressure. Furthermore, a thorough analysis of the dynamic ion-ion structure factor in shock-compressed copper is performed and the adiabatic speed of sound is extracted and compared with experimental data.
@article{arxiv.2205.06638,
title = {An \textit{ab initio} study of shock-compressed copper},
author = {Maximilian Schörner and Bastian B. L. Witte and Andrew D. Baczewski and Attila Cangi and Ronald Redmer},
journal= {arXiv preprint arXiv:2205.06638},
year = {2022}
}
Comments
13 pages, 14 figures, 1 table, accepted at Physical Review B