Conductance in a one-dimensional spin polarized gas

Abstract

We present a theoretical analysis of the recent experimental results of Thomas et al. on transport properties of spin-polarized quantum wires. We suggest an explanation of the observed deviations of the conductance from the universal value G = 2e2/h per channel in the wire. We argue that the new quasiplateau observed for the conductance at the value G = 1.4e2/h is a result of the proximity between the spin-polarized phase and the metallic phase The enhancement of the conductance from the value G = e2/h to G = 1.4e2/h is due to the hybridization of the electronic state at K↓F≍ 0 with the chiral states at K↑F and K↑F.