Heat transport and thermoelectric efficiency of two-level quantum dot attached to ferromagnetic electrodes
M. Wierzbicki , Renata Świrkowicz
AbstractEnergy transport, in the linear response regime, through a two-level quantum dot/molecule attached to ferromagnetic leads is studied in the Coulomb blockade region with use of the Green function formalism. Thermal conductance and figure of merit ZT are calculated and discussed for two configurations of magnetic moments and different polarization factor in the leads. A strong dependence of ZT on polarization is found. A substantial enhancement of efficiency can be observed in molecular junctions with one of energy levels weakly coupled to the leads. Moreover, in systems, in which spin accumulation in electrodes is important, a quite considerable spin efficiency can be expected.
|Journal series||Physics Letters A, ISSN 0375-9601|
|Keywords in English||Figure of merit, Quantum dots, Spin effects, Thermal conductance|
|Publication indicators||: 2011 = 1.632 (2) - 2011=1.731 (5)|
|Citation count*||12 (2015-02-04)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.