GONZÁLEZ , Augusto

Exact diagonalization studies of the level density in a six-electron quantum dot under magnetic fields around 7 T ("filling factor" around 1/2) are reported. In any spin-polarization channel, two regimes are visible in the dot excitation spectrum: one corresponding to interacting quasiparticles (i.e., composite fermions) for excitation energies...

The structure of E1 resonances has been examined in a microscopic random phase approximation calculation for neutral, symmetric, closed shell and electron-hole systems in a quantum dot. The number of electron-hole pairs, N, is varied from 6 to 42. The occurrence of small, but distinct, E1 peaks in the far-infrared spectra located in the low...