抄録
The electron transport through the tunneling potentialin magnetic fields is studied.Systems that we consider are a two-terminal quantum wire with a potential anda four-terminal cross junction.The increase of the magnetic field suppresses the transmission of electronsand the conductance decreases rapidly with the magnetic field.The electron is totally reflected atcertain values of the magnetic field and we find that this phenomenonis attributed to the interference of subbands with complex wavenumbersin the tunneling region.In the four-terminal configuration, the calculated Hall resistance shows oscillation-like behavior and changes its sign repeatedly.The suppression of the transmission to the forward leadis again found in this configuration.The distribution of probability density and current densityin the tunneling barriers is also examined.
