Electron Conduction and Quantum Phenomena in 2D Heterostructures

A quasi two-dimensional electron gas confined at the interface between two semiconductors is a nearly ideal low disordered system. Its low temperature transport properties are dominated by a large variety of quantum phenomena. Some recent theoretical and experimental studies on the correlation energy of the plasma, on the spin-splitting of the conduction band, on the observation of weak antilocalization and on a unified understanding of the Integer and Fractional Quantum Hall effects are discussed in order to illustrate the very rich physics of these artificial structures.