The molecular dynamics method is used to study the structure of two-dimensional clusters that can be created in electronic systems above the surface of superfluid helium, using triangular, square, hexagonal and round holding electrode geometries. Clusters with a fixed surface density of 108 cm−2, but different numbers of particles (from 3 to 406) are considered. The spatial configurations of particles in clusters are calculated corresponding to a temperature of 10−2 K. The shape of the cluster significantly affects the arrangement of the electrons inside. If the symmetry of the cluster is consistent with the triangular symmetry of the electronic crystal, then for some numbers of particles, clusters with ideal defect-free packing are possible; otherwise, the clusters contain defects. An additional external field applied to the cluster significantly changes the configuration of its particles.

中文翻译：

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低温下各种形状的二维电子簇结构

分子动力学方法用于研究可以在超流氦表面上方的电子系统中创建的二维簇的结构，使用三角形、正方形、六边形和圆形固定电极几何形状。固定表面密度为 108 cm-2 的簇，但考虑了不同数量的粒子（从 3 到 406）。计算簇中粒子的空间配置对应于 10-2 K 的温度。簇的形状显着影响内部电子的排列。如果团簇的对称性与电子晶体的三角对称性一致，那么对于一定数量的粒子，具有理想无缺陷堆积的团簇是可能的；否则，簇包含缺陷。