Experimental Test of the Numerical Renormalization Group Theory for Inelastic Scattering from Magnetic Impurities

TL;DR

This paper experimentally tests the numerical renormalization group theory for inelastic scattering from magnetic impurities by measuring phase coherence time in Au/Fe Kondo wires and comparing it with theoretical predictions.

Contribution

It provides experimental validation of the NRG theory for inelastic scattering in magnetic impurity systems at low temperatures.

Findings

Good agreement with theory down to 0.2 T_K

Inverse phase coherence time varies linearly below T_K

Supports the NRG theory for magnetic impurity scattering

Abstract

We present measurements of the phase coherence time \tauphi in quasi one-dimensional Au/Fe Kondo wires and compare the temperature dependence of \tauphi with a recent theory of inelastic scattering from magnetic impurities (Phys. Rev. Lett. 93, 107204 (2004)). A very good agreement is obtained for temperatures down to 0.2 $T_K$. Below the Kondo temperature $T_K$, the inverse of the phase coherence time varies linearly with temperature over almost one decade in temperature.