Abstract

An investigation is performed of the relaxation of plasma excitations in two-dimensional electron systems (2D-ESes) in GaAs/AlGaAs heterostructures. The effect radiational and incoherent collisional relaxation mechanisms have on the linewidth of cyclotron magnetoplasma resonance (CR) is studied. CR arises as a pure resonance that does not hybridize with dimensional magnetoplasma excitations. It is shown how magnetoplasma resonances form a CR’s fine structure due to the interaction between coherent radiative and incoherent collisional mechanisms of two-dimensional plasma relaxation. A comparative analysis is performed of the dependences of cyclotron and transport periods of relaxation on both the temperature and electron density of 2D-ESes. It is demonstrated that the period of cyclotron relaxation could exceed that of transport at low electron densities.

中文翻译：

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二维电子系统中等离子体激发的弛豫

摘要

研究了GaAs / AlGaAs异质结构中二维电子系统（2D-ESes）中等离子体激发的弛豫。研究了辐射和非相干碰撞弛豫机制对回旋磁等离子体共振（CR）的线宽的影响。CR产生为纯共振，不与尺寸磁等离子体激发杂交。结果表明，由于二维等离子体弛豫的相干辐射和非相干碰撞机制之间的相互作用，磁等离子体共振如何形成CR的精细结构。对回旋加速器和弛豫的传输周期对2D-ESes的温度和电子密度的依赖性进行了比较分析。