Non Equilibrium Noise as a Probe of the Kondo Effect in Mesoscopic Wires

TL;DR

This paper investigates how non-equilibrium noise in mesoscopic wires with magnetic impurities reveals the Kondo effect, showing a peak in shot-noise to current ratio at biases near the Kondo temperature.

Contribution

It introduces a novel way to probe the Kondo effect through non-equilibrium noise measurements in mesoscopic wires, highlighting a characteristic peak at the Kondo crossover.

Findings

Peak in shot-noise to current ratio at Kondo temperature biases

Enhanced impurity contribution in effective distribution

Increased inelastic scattering rate at the Kondo crossover

Abstract

We study the non-equilibrium noise in mesoscopic diffusive wires hosting magnetic impurities. We find that the shot-noise to current ratio develops a peak at intermediate source-drain biases of the order of the Kondo temperature. The enhanced impurity contribution at intermediate biases is also manifested in the effective distribution. The predicted peak represents increased inelastic scattering rate at the non-equilibrium Kondo crossover.