Effects of the range of the potential on the structure and dynamics of two-dimensional Coulomb clusters
Titel:
Effects of the range of the potential on the structure and dynamics of two-dimensional Coulomb clusters
Auteur:
Yurtsever, E. Calvo, F.
Verschenen in:
Molecular physics
Paginering:
Jaargang 106 (2008) nr. 2-4 pagina's 289-298
Jaar:
2008-01
Inhoud:
The structure, dynamics, and thermodynamics of finite systems of two-dimensional particles interacting mutually through a shielded Coulomb potential, V(r) = e(-κr)/r, and bound together by an isotropic parabolic trap, are investigated by means of global optimization and simulation methods. As the range of the potential decreases, or as κ increases, the number of distinct minima rapidly increases for a given size and the cluster generally shrinks. Looking more specifically at selected sizes below 50, non- monotonic cluster size effects seem to dominate the energetics, chaotic dynamics, and thermodynamics, even though the melting point is weakly affected by the range of the potential.
Tijdschrift beschrijving