Speaker
Aleksey Shumikhin
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/P5.3003.pdf
The equation of state and transport properties of metal vapors in
supercritical fluid regime
A.L. Khomkin, A.S. Shumikhin
Joint Institute for High Temperatures of RAS, Moscow, Russia
In this work, using the chemical model of the atomic plasma “3+” proposed in [1], we present a
joint calculation of the equation of state and transport properties of supercritical fluid of metal
vapors within the unified approach. It consists of free non-ideal electrons and ions and atoms
immersed in jellium. Given the presence of jellium, we named this model the “3+” model.
Jellium is constituted by tails of wave functions of bound electrons. Jellium provides the
appearance of collective quantum energy—cohesion. Jellium does not change the balance and
the electroneutrality equations. The main feature of jellium is its collectivity and the ability to
conduct the current. The interaction between free charges is described in nearest neighbor
approximation (NNA). We show that the corrections for the charge-charge interaction and
interatomic interaction compensate each other by calculating the composition and the equation
of state. The equation of state and electrical conductivity were calculated in supercritical regime
and for binodal for various group of metals: alkali (Cs, Rb, Na), alkali earth (Be), transition (Cu,
Fe, W etc.) and posttransition (Al, Pb etc.). The obtained results are compared with data of
physical and numerical experiments [2-5]. Calculations in the framework of the “3+” model
show a good agreement with both physical and numerical experiments. We calculated also the
critical point parameters (density, temperature, pressure and electrical conductivity) for various
groups of metals.
References
1. A.L. Khomkin, A.S. Shumikhin, J. Exp. Theor. Phys. 124, 1001 (2017).
2. A.W. DeSilva, A.D. Rakhel, Contrib. Plasma Physics 45, 236 (2005).
3. J. Clerouin, P. Noiret, V.N. Korobenko, A.D. Rakhel, Phys. Rev. B 78, 224203 (2008).
4. F. Hensel, J. Phys.: Condens. Matter 2, SA33 (1990).
5. D. Li et al, Sci. Rep. 4, 5898 (2015).
