Solid–fluid phase transitions under extreme pressures including negative ones

Upon heating or isotropic expansion, condensed matters (solids and liquids) can reach their stability limits, where the system must be stabilized by the appearance of a second phase. During isotropic expansion, the pressure can reach negative values. In auxetic materials, volume expansion is an inherent way of behavior, therefore, negative-pressure states can be reached easily during uni-axial stretch. In this paper, a comparison of various stability limits of pure and ordered one-component stretched solids will be mapped, with special focus on auxetic materials.