Quantum corrections to the conductivity and Hall coefficient of a 2D electron gas in a dirty AlGaAs/GaAs/AlGaAs quantum well: transition from diffusive to ballistic regime

摘要

We report an experimental study of the quantum corrections to thelongitudinal conductivity and the Hall coefficient of a low mobility, highdensity two-dimensional two-dimensional electron gas in a AlGaAs/GaAs/AlGaAsquantum well in a wide temperature range (1.5 K - 110 K). This temperaturerange covers both the diffusive and the ballistic interaction regimes for oursamples. It was therefore possible to study the crossover region for thelongitudinal conductivity and the Hall effect.