Transport Properties of Two-Dimensional Electron Gases inAntiparallel Magnetic-Electric Barrier Structures

We study theoretically transport properties of two-dimensionalelectron gases through antiparallel magnetic-electric barrier structures. Two kinds of magnetic barrier configurations are employed: one is that the strength of the double δ-function in opposite directions is equal and the other is that the strength is unequal. Similarities and differences of electronic transports are presented. It is found that thetransmission and the conductance depend strongly on the shape of the magnetic barrier and the height of the electric barrier. The results indicate that this system does not possess anyspin filtering and spin polarization and electron gases canrealize perfect resonant tunneling and wave-vector filtering properties.Moreover, the strength of the effect of the inhomogeneousmagnetic field on the transport properties is discussed.