| We have demonstrated that impurity donor ions in GaAs/AlGaAs multiple-quantum-wells can be used to study electron-electron interactions by far infrared (FIR) magneto-optical spectroscopy in high magnetic fields and at low temperatures. For the simplest many-electron system, an isolated negatively-charged donor ion (D;For many-electron systems with embedded impurity donor ions, we have observed the continuous evolution of the isolated D... |
