A MICROSCOPIC STUDY OF LANDAU-LEVEL STATES IN QUANTUM WIRES

The electronic states of GaAs/AlGaAs quantum well wires under an appli ed magnetic field are studied by using the empirical pseudopotential m ethod. The energy spectra are calculated as a function of the magnetic field strength. The results show a strong non-parabolicity and field- dependent subband effective mass. The formation of bulk-like Landau le vels and edge (skipping) states results in a rapid increasing of densi ty of states at the subband bottom reflecting the change of the 1D sub band structures to 2D-like Landau levels. The asymptotic behaviours of the Landau levels in the weak and strong magnetic field limits are al so obtained by a simple effective mass analysis and used to interpret the results of the microscopic calculation.