S. Hamaguchi et al., TRIPLE POINT OF YUKAWA SYSTEMS, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 56(4), 1997, pp. 4671-4682
The molecular dynamics simulations of Yukawa (i.e., screened-Coulomb)
systems that were applied to the regime of weak screening in an earlie
r study [S. Hamaguchi, R. T. Farouki, and D. H. E. Dubin, J. Chem. Phy
s. 105, 7641 (1996)] are extended to the strong screening regime. Tran
sition temperatures at the fluid-solid phase boundary and the solid-so
lid phase boundary are obtained as functions of the screening paramete
r kappa = a/lambda(D) (i.e., the ratio of the Wigner-Seitz radius a to
the Debye length lambda(D)). The resulting phase diagram also covers
the triple point-the intersection of the fluid-solid and solid-solid p
hase boundaries-at kappa = 4.28 and Gamma = 5.6 x 10(3), where Gamma i
s the ratio of the Coulomb potential energy to the kinetic energy per
particle (i.e., Gamma = Q(2)/4 pi epsilon(0)akT, where Q is the charge
of each Yukawa particle and T is the system temperature). Yukawa syst
ems serve as models for plasmas and colloidal suspensions of charged p
articulates.