Volume 56, Number 4, November 2001
|Page(s)||576 - 582|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 December 2003|
Thermoelectric effects in Kondo-correlated quantum dots
Institut für Theoretische Festkörperphysik, Universität
Karlsruhe D-76128 Karlsruhe, Germany
and Forschungszentrum Karlsruhe, Institut für Nanotechnologie D-76021
2 NEST-INFM & Dipartimento Metodologie Fisiche e Chimiche (DMFCI) Università di Catania - Viale A. Doria 6, I-95125 Catania, Italy
Corresponding author: firstname.lastname@example.org
Accepted: 24 August 2001
In this letter we study thermoelectric effects in ultra-small quantum dots. We study the behaviour of the thermopower, Peltier coefficient and thermal conductance both in the sequential tunneling regime and in the regime where Kondo correlations develop. Both cases of linear response and non-equilibrium induced by strong temperature gradients are considered. The thermopower is a very sensitive tool to detect Kondo correlations. It changes sign as a function of both temperature and temperature gradient. We also discuss violations of the Wiedemann-Franz law.
PACS: 72.20.Pa – Thermoelectric and thermomagnetic effects / 72.15.Qm – Scattering mechanisms and Kondo effect / 73.23.Hk – Coulomb blockade; single-electron tunneling
© EDP Sciences, 2001
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