Electronic Conductance for a Quantum Wire with Weak Dresselhaus Spin-Orbit Coupling

The electron transport property for a Dresselhaus spin-orbit coupling(SOC)quantum wire nonadiabatically connected to the two normal leads without SOC in a geometry of wide-narrow-wide(WNW) is investigated.Using the scattering matrix approach within the effective free-electron approximation,we have calculated the spin-dependent conductance for the system.It is demonstrated that,through a few numerical examples,the quantized conductance of the system shows quantized plateaus with oscillation at the subband edges.These transport properties can be changed by the strength of Dresselhaus SOC,the number of propagation modes in the leads and the wire length.