Abstract
A two-dimensional Wigner crystal formed by electrons located above a rectangular electrode with uniformly distributed positive charge has been studied by molecular dynamics methods. The authors have analyzed not only possible electron configurations over a narrow electrode region at a fixed electron density, depending on the width of the electrode, but also patterns of transitions from one configuration to another. In addition, this paper considers an electron configuration consisting of several chains. Using the Fourier transform for time dependencies of average electron coordinates during modeling, the authors have determined plasma oscillation spectra. Frequencies observed during modeling have been compared with theoretical frequencies for one and two chains.
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