8th Liquid Matter Conference September 6-10, 2011 Wien, Austria ...

Fri 911:10-14:00P1.21Relation between structure and thermodynamicproperties of anomalous liquid metalsGuy Makov, 1 Eyal Yahel, 2 Yulia Shor, 1 Yaron Greenberg, 1 and Elad Caspi 21 Ben Gurion University, PO Box 653, 84105, Beer Sheva, Israel2 NRCN, Beer Sheva, IsraelSome liquid metals exhibit anomalous thermodynamic properties such as decreasing melting curvingcurves, increasing sound velocity with temperature or negative thermal expansion coefficients.The origin of these phenomena and their inter-relation remain unknown. We hypothesise thatthese phenomena originate in the microscopic structure of the liquid and its evolution across thepressure-temperature phase space. In support of this hypothesis we consider the quasi-crystallinemodel of the liquid which relates the structure of the liquid and physical parameters such as thesound velocity. We find that the structure of liquid elements of group V is described within thismodel by considering an A7 like deformed simple cubic structure and the deformation decreasesalong the column. Furthermore, measuring the structure of these liquids, we find indeed that thereis a correlation between the sound velocity and the structure of the liquid.21