Transport properties of two-dimensional electrons through multiple magnetic barriers

Abstract

Transport properties of 2-dimensional electron system in a varying magnetic flied are investigated theoretically by a transfer matrix technique. The exact magnetic field profiles and the corresponding vector potentials are presented instead of simulated ones. The results show that several transmission domains are formed and each domain contains (N−1)-fold resonance splitting which fully depends on the number of magnetic barriers N. The computed conductance also exhibits rich transfer properties. Three peaks are observed in the low energy range. With the increasing of N, the conductance curves tend to coincide with each other as the tilting angle of magnetization relative to z direction equals to π/2, while the conductance curves shift downwards for other θ. All of our calculations reveal the important features of electron tunneling through multiple magnetic barriers.