Ballistic Transport in the Bent Quantum Wire

抄録

The effects of circular bends on ballistic transport in a quantum wire with hard-wall confinement potential are investigated. By means of the channel-matching method, the scattering matrix is calculated as a function of the Fermi energy. We discuss the dependence of scattering probabilities on the external magnetic field, bending radius, and bending angle. It is shown that the coupling of channels is different for right-turn and left-turn bends in the magnetic field. Furthermore, there appear to be extremely narrow dips in conductance just below the threshold energies for the next channel.