Multistep radial melting in small two-dimensional classical clusters

Abstract

We report on a molecular dynamics study of small classical two-dimensional clusters with ringlike configurations. We focus on the particles motion at low temperatures before the radial and angular melting sets in. It is shown that in magic number configurations a local radial melting of subshells occur, which is related to the intershell rotation.

Multiple rings in a 3D anisotropic Wigner crystal: Structural and dynamical properties

“…Analogous fine structures in 2D systems were reported in Ref. 34. In 3D systems we find that fine structure occurs for systems with N = 19, 23, and 24 particles and anisotropy parameter indicated by vertical red lines in Fig.…”

Ground-State Configurations of 2D Clusters of Classical Charged Particles

“…Strong evidence for reliability of the recent Monte Carlo simulations [4] of the ground-state configurations of the classical Coulomb clusters has been provided using the powerful genetic algorithm. The ground state configurations and the ring structure found previously by the Monte Carlo simulations [1,4,7] have been confirmed by our GA approach as shown in Table. The estimates of the potential energy minima shown in Table confirm the previous findings [4] up to all decimal places quoted there. Furthermore, we have also confirmed the metastable configurations, increasing somewhat the probability of mutation p m with respect to the value leading to the optimal solution.…”

Hysteresis and reentrant melting of a self-organized system of classical particles confined in a parabolic trap

“…This transition occurs before the system is completely melted and is a thermally induced structural phase transition. This interesting phenomenon was found in diverse previous studies [28,29,30] but, in this case, it is the result of the increase of disorder in small bubbles when the temperature approaches T = 0.0053.…”