Impurity and spin effects on the magneto-spectroscopy of a THz-modulated nanostructure

Article

关键词: DENSITY-FUNCTIONAL THEORY;    QUANTUM DOTS;    ELECTRON-GAS;    APPROXIMATION;   

DOI  :  10.1103/PhysRevB.68.165343

来源: SCIE

【 摘 要 】

We present a grid-free density functional theory model appropriate to explore the time evolution of electronic states in a semiconductor nanostructure. The model can be used to investigate both the linear and nonlinear responses of the system to an external short-time perturbation in the THz regime. We use the model to study the effects of impurities on the magnetospectroscopy of a two-dimensional electron gas in a nanostructure excited by an intense THz radiation. We do observe a reduction in the binding energy of the impurity with increasing excitation strength, and at a finite magnetic field we find a slow onset of collective spin oscillations that can be made to vanish with a stronger excitation.

【 授权许可】

Free