Cross-Over between universality classes in a magnetically disordered metallic wire

TL;DR

This paper investigates how magnetic impurities affect electronic conduction in disordered quasi-one-dimensional wires, revealing a crossover between different universality classes through numerical analysis of localized and metallic regimes.

Contribution

It introduces a numerical Landauer approach to study the crossover between universality classes in disordered wires with magnetic impurities, highlighting the impact of magnetic disorder strength.

Findings

Identification of the crossover between universality classes

Numerical analysis of conduction regimes

Impact of magnetic disorder on transport properties

Abstract

In this article we present numerical results of conduction in a disordered quasi-1D wire in the possible presence of magnetic impurities. Our analysis leads us to the study of universal properties in different conduction regimes such as the localized and metallic ones. In particular, we analyse the cross-over between universality classes occurring when the strength of magnetic disorder is increased. For this purpose, we use a numerical Landauer approach, and derive the scattering matrix of the wire from electron's Green's function.