Thermoelectric effects in a double quantum dot system weakly coupled to ferromagnetic leads

Details Thermoelectric effects in a double quantum dot system weakly coupled to ferromagnetic leads Thermoelectric effects in a double quantum dot system weakly coupled to ferromagnetic leads

2012-04-17

arxiv.org/abs/1204.3720v1

Solid State Communications 152 (2012) 914-918

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pages, 4 figures

Scientific paper

10.1016/j.ssc.2012.02.003

Thermoelectric effects through a serial double quantum dot system weakly coupled to ferromagnetic leads are analyzed. Formal expressions of electrical conductance, thermal conductance, and thermal coefficient are obtained by means of Hubbard operators. The results show that although the thermopower is independent of the polarization of the leads, the figure of merit is reduced by an increase of polarization. The influences of temperature and interdot tunneling on the figure of merit are also investigated, and it is observed that increase of the interdot tunneling strength results in reduction of the figure of merit. The effect of temperature on the thermal conductance is also analyzed.

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