Evidence for a charge Kondo effect in Pb(1-x)Tl(x)Te from measurements of thermoelectric power

TL;DR

This study provides evidence of a charge Kondo effect in Pb(1-x)Tl(x)Te through thermoelectric power measurements, indicating a higher Kondo temperature than previously estimated.

Contribution

It presents experimental evidence for a charge Kondo effect in Pb(1-x)Tl(x)Te and revises the estimated Kondo temperature upward based on thermoelectric power data.

Findings

Evidence of Kondo contribution in thermoelectric power measurements

Estimated Kondo temperature around 50-70 K

Implication of charge Kondo effect in Pb(1-x)Tl(x)Te

Abstract

We report measurements of the thermoelectric power (TEP) for a series of Pb(1-x)Tl(x)Te crystals with x = 0.0 to 1.3%. Although the TEP is very large for x = 0.0, using a single band analysis based on older work for dilute magnetic alloys we do find evidence for a Kondo contribution of 11 - 18 uV/K. This analysis suggests that Tk is ~ 50 - 70 K, a factor 10 higher than previously thought.