NONLINEAR PHENOMENA IN COMPLEX SYSTEMS
An Interdisciplinary Journal

2007, Vol.10, No.3, pp.278-283


Microwave Induced Tunneling in Stub Tuner Mesoscopic Device and its Chaotic Behavior.
Attia. A. Awadalla, Arafa H.A ly, and Adel. H. Phillips

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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