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.