Simulations of liquid rubidium near the critical density

Abstract

Quantum molecular dynamic simulations were used to examine the change in atomic and electronic structure in liquid rubidium along its liquid-vapor coexistence curve below twice the critical density. We observe evidence for clustering at $0.58\phantom{\rule{0.3em}{0ex}}\mathrm{g}∕{\mathrm{cm}}^{3}$, the presence of bound states near $0.47\phantom{\rule{0.3em}{0ex}}\mathrm{g}∕{\mathrm{cm}}^{3}$, and dimers at the critical density $(0.29\phantom{\rule{0.3em}{0ex}}\mathrm{g}∕{\mathrm{cm}}^{3})$.