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

Details Hysteresis and re-entrant melting of a self-organized system of classical particles confined in a parabolic trap Hysteresis and re-entrant melting of a self-organized system of classical particles confined in a parabolic trap

2007-07-10

arxiv.org/abs/0707.1498v1

Physics

Condensed Matter

Soft Condensed Matter

8 pages, 6 figures

Scientific paper

10.1103/PhysRevE.77.031608

A self-organized system composed of classical particles confined in a two-dimensional parabolic trap and interacting through a potential with a short-range attractive part and long-range repulsive part is studied as function of temperature. The influence of the competition between the short-range attractive part of the inter-particle potential and its long-range repulsive part on the melting temperature is studied. Different behaviors of the melting temperature are found depending on the screening length ($\kappa$) and the strength ($B$) of the attractive part of the inter-particle potential. A re-entrant behavior and a thermal induced phase transition is observed in a small region of ($\kappa,B$)-space. A structural hysteresis effect is observed as a function of temperature and physically understood as due to the presence of a potential barrier between different configurations of the system.

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