双耦合量子环中的电声声子散射和电子弛豫
Electron-acoustic-phonon scattering and electron relaxation in two-coupled quantum rings
摘要：
研究了耦合量子环在电磁外场作用下的声子诱导的电子弛豫。本文讨论了垂直耦合GaAs量子环中的单电子问题。电子-声子相互作用被解释为变形势和压电场耦合机制。根据外部的领域，环半径和环之间的分离，我们表明，这两个不同的耦合有不同的权重和重要性。发现从电子激发态到基态的散射率随系统几何形状或外场的变化有明显的振荡。
英文摘要：
Electron relaxation, induced by acoustic phonons, is studied for coupled quantum rings in the presence of external fields, both electric and magnetic. We address the problem of a single electron in vertically coupled GaAs quantum rings. Electron-phonon interaction is accounted for both deformation potential and piezoelectric field coupling mechanisms. Depending on the external fields, the ring radii and the separation between the rings, we show that the two different couplings have different weights and importance. Significant oscillations are found in the scattering rates from electron excited states to the ground state, as a function of either the geometry of the system or the external fields.
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