SPIN CONDUCTANCE OF THE QUANTUM WIRE

The electron spin transport along a semiconducting quantum wire connected to spin-unpolarized electron reservoirs and the spin ltering properties of the wire are investigated. The wire is immersed in a magnetic eld that is perpendicular to the wire axis and substrate plane on which the wire is grown. The lateral conning potential is assumed to be parabolic. The spinorbit interaction is included via Rashba Hamiltonian that in conjunction with the Zeeman Hamiltonian determines the spin conductance of the wire. Dependences of the spin current and conductance on the voltage applied over the ends of the wire as well as on the magnetic eld strength are analysed