Naslov
Charge Kondo Effect in Thermoelectric Properties of Lead Telluride Doped with Thallium Impurities

Autori
Costi, Theo ; Zlatić, Veljko

Vrsta, podvrsta i kategorija rada
Poglavlja u knjigama, znanstveni

Knjiga
New materials for thermoelectric applications: theory and experiment

Urednik/ci
Zlatić, Veljko ; Hewson, Alex

Izdavač
Springer

Grad
Dordrecht

Godina
2013

Raspon stranica
67-80

ISBN
978-94-007-4986-3

Ključne riječi
Thermoelectricity, lead-telluride, charge Kondo effect

Sažetak
We investigate the thermoelectric properties of PbTe doped with a small concentration x of Tl impurities acting as acceptors and described by Anderson impurities with negative on-site correlation energy. The resulting charge Kondo effect naturally accounts for a number of the low temperature anomalies in this system, including the unusual doping dependence of the carrier concentration, the Fermi level pinning and the self- compensation effect. The Kondo anomalies in the low temperature resistivity at temperatures Tles 10K and the x- dependence of the residual resistivity are also in good agreement with experiment. Our model also captures the qualitative aspects of the thermopower at higher temperatures T > 300 K for high dopings (x > 1.6%) where transport is expected to be largely dominated by carriers in the heavy hole band of PbTe.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA