2009/01/27 by H. Baumgartner, D. Block, Dietmar Block +2 · 2 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Dust and Plasma Wave Phenomena #Quantum Electrodynamics and Casimir Effect #physics.plasm-ph
paper · pdf · doi:10.1002/ctpp.200910027
published as Contrib. Plasma Phys. 49, 281-302 (2009) · Invited review, submitted to Contrib. Plasmas Physics
arxiv created 2009/01/27 · openalex publication_date 2009/05/28 · arxiv updated 2015/05/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Abstract In this review, an overview of structural properties and phase transitions in finite spherical dusty (complex) plasma crystals – so‐called Yukawa balls – is given. These novel kinds of Wigner crystals can be directly analyzed experimentally with video cameras. The experiments clearly reveal a shell structure and allow to determine the shell populations, to observe metastable states and transitions between configurations as well as phase transitions. The experimental observations of the static properties are well explained by a rather simple theoretical model which treats the dust particles as being confined by a parabolic potential and interacting via an isotropic Yukawa pair potential. The excitation properties of the Yukawa balls such as normal modes and the dynamic behavior, including the time‐dependent formation of the crystal requires, in addition, to include the effect of friction between the dust particles and the neutral gas. Aside from first‐principle molecular dynamics and Monte Carlo simulations several analytical approaches are reviewed which include shell models and a continuum theory. A summary of recent results and theory‐experiment comparisons is given and questions for future research activities are outlined (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)