QUANTUM TRANSPORT OF 2-DIMENSIONAL ELECTRON-GAS THROUGH FINITE LATERAL MAGNETIC SUPERLATTICE

We have investigated the quantum transport properties of electrons thr ough multiple-magnetic-barrier structures, where the magnetic barriers are created by depositing ferromagnetic stripes on top of a heterostr ucture. The transmission coefficient and current-density-voltage (J-V) characteristic are calculated. It is shown that the quantum transport is anisotropic and depends on the transmission direction of the incom ing electron. An external electric held strengthens the anisotropy of the transmission. The J-V characteristic exhibits negative conductivit ies similar to a multiple-electric-barrier structure. (C) 1997 Academi c Press Limited.