The Conductance in the One Dimensional Spin Polarized Gas

TL;DR

This paper provides a theoretical explanation for deviations in conductance observed in spin polarized quantum wires, attributing new conductance features to phase proximity and electronic state hybridization.

Contribution

It introduces a model explaining conductance deviations in spin polarized quantum wires based on phase proximity and state hybridization effects.

Findings

The conductance deviation to 1.4e^2/h is linked to phase proximity.

Hybridization of electronic states explains conductance enhancement.

The model accounts for deviations from the universal conductance value.

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 $G=2e^2/h$ per channel in the wire. We argue that the new quasi plateau observed for the conductance at the value $G=1.4e^2/h$ is a result of the proximity between the spin polarized phase and the metallic one. The enhancement of the conductance from the value $G=e^2/h$ to $G=1.4e^2/h$ is due to the hybridization of the electronic state at $K_F^{\downarrow}\approx 0$ with the chiral states at $K_F^{\uparrow}$ and $-K_F^{\uparrow}$.