Max Planck Institute for Extraterrestrial Physics, 85741 Garching, Germany.
Phys Rev Lett. 2010 May 14;104(19):195001. doi: 10.1103/PhysRevLett.104.195001. Epub 2010 May 11.
Dedicated experiments on melting of two-dimensional plasma crystals were carried out. The melting was always accompanied by spontaneous growth of the particle kinetic energy, suggesting a universal plasma-driven mechanism underlying the process. By measuring three principal dust-lattice wave modes simultaneously, it is unambiguously demonstrated that the melting occurs due to the resonance coupling between two of the dust-lattice modes. The variation of the wave modes with the experimental conditions, including the emergence of the resonant (hybrid) branch, reveals exceptionally good agreement with the theory of mode-coupling instability.
进行了二维等离子体晶体熔化的专门实验。熔化总是伴随着颗粒动能的自发增长，这表明该过程存在一种普遍的等离子体驱动机制。通过同时测量三个主要的尘埃晶格波模式，可以明确证明熔化是由于两个尘埃晶格模式之间的共振耦合引起的。波模式随实验条件的变化，包括共振（混合）分支的出现，与模式耦合不稳定性理论非常吻合。
