Spin-filtering and charge- and spin-switching effects in a quantum wire with periodically attached stubs

摘要: Spin-dependent electron transport in a periodically stubbed quantum wire the presence of Rashba spin-orbit interaction (SOI) is studied via nonequilibrium Green’s function (GF) method combined with Landauer-Buttiker formalism. By comparing straight wire, magnitude spin conductance can be enhanced obviously. In addition, charge and switching also found considered system. The mechanism these properties revealed by analyzing total density spin-polarized distributions wire. Furthermore, periodic spin-density islands high polarization are inside stubs, owing to between SOI-induced effective magnetic field. These interesting findings may useful further understanding low-dimensional systems devising an all-electrical multifunctional spintronic device based on proposed structure.