Naslov
Strongly Enhanced Thermal Transport in a Lightly Doped Mott Insulator at Low Temperature

Autori
Zlatić, Veljko ; Freericks, J.K.

Izvornik
Physical Review Letters (0031-9007) 109 (2012), 26; 266601-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
figure of merit; Falicov-Kimball model

Sažetak
We show how a lightly doped Mott insulator has hugely enhanced electronic thermal transport at low temperature. It displays universal behavior independent of the interaction strength when the carriers can be treated as nondegenerate fermions and a nonuniversal “crossover” region where the Lorenz number grows to large values, while still maintaining a large thermoelectric figure of merit. The electron dynamics are described by the Falicov-Kimball model which is solved for arbitrary large on-site correlation with a dynamical mean-field theory algorithm on a Bethe lattice. We show how these results are generic for lightly doped Mott insulators as long as the renormalized Fermi liquid scale is pushed to very low temperature and the system is not magnetically ordered.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA