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

Abstract

We present a grid-free DFT 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 the nonlinear response 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 magneto-spectroscopy 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.

arXiv commentLaTeX,10 pages with 11 embedded postscript figures

References in corpus (5)

• Spectroscopy of nanoscopic semiconductor rings
• Non-adiabatic current generation in a finite width semiconductor ring
• Oscillation modes of two-dimensional nanostructures within the time-dependent local-spin-density approximation
• Spin Ensemble Density Functional Theory for Inhomogeneous Quantum Hall Systems
• Hartree-Fock dynamics in highly excited quantum dots

Cited by in corpus (3)

• The effects of a far-infrared photon cavity field on the magnetization of a square quantum dot array
• Excitation of radial collective modes in a quantum dot: Beyond linear response
• The tuning of para- and diamagnetic cavity photon excitations in a square array of quantum dots in a magnetic field