2007, Vol.10, No.3, pp.278-283
We study thermoelectric transport properties of mesoscopic
devices in which the dynamics of electrons is chaotic. The
present studied device is an electronic stub tuner modeled as
S-Sm-S-Sm-S (S-superconductor, Sm-semiconductor). The thermopower
of the device is expressed in terms of the conductance of the
system, which is derived by the technique based on the
Landauer-Büttiker equation. The influence of time-varying fields
as well as the effect of magnetic field on the transport through
such a device has been taken into consideration. The results show
an oscillatory behavior of the dependence of the thermopower on
both the magnetic field and frequency of the induced field. These
oscillations appear as random fluctuation in peak heights.
Analysis of these results shows that mesoscopic fluctuations obey
Lorentzian distribution and under some conditions it is an
exponential distribution. Our results are found concordant with
those in the literature.
Key words:
electronic stub tuner, chaotic dynamics, fluctuations,
Andreev reflections
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