Local Symmetries and Order-Disorder Transitions in Small Macroscopic Wigner Islands

Details Local Symmetries and Order-Disorder Transitions in Small Macroscopic Wigner Islands Local Symmetries and Order-Disorder Transitions in Small Macroscopic Wigner Islands

2008-03-21

arxiv.org/abs/0803.3157v1

Phys. Rev. E 71, 046105 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

14 pages, 10 figures

Scientific paper

10.1103/PhysRevE.71.046105

The influence of local order on the disordering scenario of small Wigner islands is discussed. A first disordering step is put in evidence by the time correlation functions and is linked to individual excitations resulting in configuration transitions, which are very sensitive to the local symmetries. This is followed by two other transitions, corresponding to orthoradial and radial diffusion, for which both individual and collective excitations play a significant role. Finally, we show that, contrary to large systems, the focus that is commonly made on collective excitations for such small systems through the Lindemann criterion has to be made carefully in order to clearly identify the relative contributions in the whole disordering process.

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