Second plasmon and collective modes in binary Coulomb systems
Second plasmon and collective modes in binary Coulomb systems
复制标题
二元库仑系统中的第二等离子体激元和集体模式
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
K. Golden
中科院分区：
文献类型：
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作者：
G. Kalman;Z. Donkó;P. Hartmann;K. Golden
在由两种不同的带电物种组成的系统中，我们确定了第二个低频等离子体激元的激发。在强耦合时，高频（第一）和低频（第二）等离子体激元的双峰取代了在弱耦合时盛行的单等离子体激元激发。我们观察到形成的第二个等离子体从声学Goldstone型模式与短程相互作用的范围扩展到无穷大。
In a system consisting of two different charged species we identify the excitation of a second, low-frequency plasmon. At strong coupling the doublet of high-frequency (first) and low-frequency (second) plasmons replaces the single-plasmon excitation that prevails at weak coupling. We observe the formation of the second plasmon from the acoustic Goldstone-type mode associated with a short-range interaction as the range is extended to infinity.