2011/08/31 by Piotr Trocha, J. Barnaś, Józef Barnaś · 211 citations
Materials Science · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Advanced Thermoelectric Materials and Devices #Condensed matter physics #Coulomb #Coulomb blockade #Electron #Figure of merit #Optoelectronics #Physics #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Seebeck coefficient #Thermoelectric effect #Transistor #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.85.085408
published in Physical Review B 85(8) (American Physical Society) · 13 pages, 12 figures, extended discussion, added references
openalex publication_date 2012/02/03 · arxiv created 2012/02/28 · arxiv updated 2015/03/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Thermoelectric effects in a double quantum dot system coupled to external magnetic/nonmagnetic leads are investigated theoretically. The basic thermoelectric transport characteristics, like thermopower, electronic contribution to heat conductance, and the corresponding figure of merit, have been calculated in terms of the linear response theory and Green function formalism in the Hartree-Fock approximation for Coulomb interactions. An enhancement of the thermal efficiency (figure of merit ZT) due to Coulomb blockade has been found. The magnitude of ZT is further considerably enhanced by quantum interference effects. Both the Coulomb correlations and interference effects lead to strong violation of the Wiedemann-Franz law. The influence of spin-dependent transport and spin bias on the thermoelectric effects (especially on Seebeck and spin Seebeck effects) is also analyzed.