Magneto-Coulomb oscillations in GaAs - AlGaAs quantum dot structures

Experiments on the magnetotransport properties of GaAs-AlGaAs lateral quantum dots have been conducted. The observed phenomena are analyzed using self-consistent electronic structure calculations for our devices. In particular, it is shown that the evolution of the terrace-like structure of the potential profile profoundly affects the single particle spectrum within the dot when several Landau levels are occupied. For the large dot device, it is expected that in the high field regime with the dot isolated from the leads, only a single Landau level is occupied in both the dot and the 2DEG region. In this regime, tunneling into and out of the dot is regulated by charging effects. We introduce a ’magneto-Coulomb oscillations’ explanation of the periodic resonances that are observed.