Institut für Theoretische Physik und Astrophysik, Christian-Albrechts Universität zu Kiel, 24098 Kiel, Germany.
Phys Rev Lett. 2010 Jan 8;104(1):015001. doi: 10.1103/PhysRevLett.104.015001. Epub 2010 Jan 5.
The correlation buildup and the formation dynamics of the shell structure in a spherically confined one-component plasma are studied. Using Langevin dynamics simulations the relaxation processes and characteristic time scales and their dependence on the pair interaction and dissipation in the plasma are investigated. While in systems with Coulomb interaction (e.g., trapped ions) in a harmonic confinement shell formation starts at the plasma edge and proceeds inward, this trend is significantly weakened for dusty plasmas with Yukawa interaction. With a suitable change of the confinement conditions the crystallization scenario can be externally controlled.
研究了在球型约束单组分等离子体中壳层结构的相关形成和形成动力学。通过朗之万动力学模拟，研究了弛豫过程和特征时间尺度及其与等离子体中的相互作用和耗散的关系。在具有库仑相互作用的系统中（例如，被俘获的离子），在谐波约束下，壳层形成始于等离子体边缘并向内进行，而对于具有 Yukawa 相互作用的尘埃等离子体，这种趋势则显著减弱。通过适当改变约束条件，可以对外控制结晶情景。
