Max-Planck-Institut für extraterrestrische Physik, 85748 Garching, Germany.
Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), 82234 Weßling, Germany.
Phys Rev E. 2017 May;95(5-1):053202. doi: 10.1103/PhysRevE.95.053202. Epub 2017 May 3.
Stability principles for bilayer complex plasmas are studied. To mimic bilayer crystals and identify the main melting mechanism of such structures, a simple binary-chain model is employed. This approach provides adequate representation of the collective effects and accurate description of the interaction nonreciprocity, associated with the wake-mediated interparticle forces. It is shown that the wake-induced coupling of the wave modes sustained in different crystalline layers can trigger the dynamical instability. Furthermore, the mode coupling is demonstrated to be a universal instability mechanism, operating also in bilayer fluids. General stability criteria for the crystalline and fluid bilayers are derived.
双层复杂等离子体的稳定性原理研究。为了模拟双层晶体并确定这种结构的主要熔化机制，采用了简单的双原子链模型。这种方法提供了集体效应的充分表示和与尾流介导的粒子间力相关的相互作用非互易性的准确描述。结果表明，不同晶体层中持续的波模的尾流诱导耦合可以引发动力学不稳定性。此外，证明了模式耦合是一种普遍的不稳定性机制，也存在于双层流体中。推导出了晶体和流体双层的一般稳定性判据。
