A COLLECTIVE DESCRIPTION OF ELECTRON INTERACTIONS .2. COLLECTIVE VS INDIVIDUAL PARTICLE ASPECTS OF THE INTERACTIONS
A COLLECTIVE DESCRIPTION OF ELECTRON INTERACTIONS .2. COLLECTIVE VS INDIVIDUAL PARTICLE ASPECTS OF THE INTERACTIONS
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DOI：
10.1103/physrev.85.338
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发表时间：
1952-01-01
期刊：
影响因子：
--
通讯作者：
BOHM, D
中科院分区：
文献类型：
--
作者：
PINES, D;BOHM, D
根据密度涨落分析了稠密电子气中电子的行为。这些密度波动可以分为两个部分。一个分量与系统作为一个整体的有组织的振荡相关联，即所谓的”等离子体”振荡。另一种是与单个电子的随机热运动有关，没有集体行为。它代表了一个由共同运动的电荷云包围的单个电子的集合，这些电荷云在德拜长度的数量级的距离内屏蔽电子场。这种密度涨落的分裂对应于库仑相互作用有效地分离成长程和短程部分;分离发生在大约德拜长度处。
The behavior of the electrons in a dense electron gas is analyzed in terms of their density fluctuations. These density fluctuations may be split into two components. One component is associated with the organized oscillation of the system as a whole, the so-called" plasma" oscillation. The other is associated with the random thermal motion of the individual electrons and shows no collective behavior. It represents a collection of individual electrons surrounded by comoving clouds of charge which screen the electron fields within a distance of the order of magnitude of the Debye length. This split up of the density fluctuations corresponds to an effective separation of the Coulomb interaction into long-range and short-range parts; the separation occurs at roughly the Debye length.