doi: 10.17586/2226-1494-2016-16-4-725-730


CURRENT-VOLTAGE CHARACTERISTICS FOR TWO SYSTEMS OF QUANTUM WAVEGUIDES WITH CONNECTED QUANTUM RESONATORS

A. S. Bagmutov, I. Y. Popov


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Article in Russian

For citation: Bagmutov A.S., Popov I.Yu. Current-voltage characteristics for two systems of quantum waveguides with connected quantum resonators. Scientific and Technical Journal of Information Technologies, Mechanics and Optics, 2016, vol. 16, no. 4, pp. 725–730. doi: 10.17586/2226-1494-2016-16-4-725-730

Abstract

We investigate two 2D quantum systems, each consisting of a waveguide and a resonator, connected through narrow holes. Systems features are studied by the solution of scattering problem. We use zero-width slits model, where the finite radius is changed by infinitely-small one. In the framework of the proposed model, exact solutions are found and scattering problem is solved for both systems using the theory of self-adjoint extensions of symmetric operators. Obtained results are then used to calculate current-voltage characteristics of suggested systems. We show that obtained characteristics have steplike kinks disappearing with the temperature growth or increase of system sizes. Parameters are calculated with the effect still observable. The results may be useful in the design of electronic devices such as nanoelectronic transistor based on resistance control in a waveguide.


Keywords: quantum waveguide, resonator, operator extension theory

Acknowledgements. This work was partially financially supported by the Government of the Russian Federation (grant 074-U01), by the Ministry of Education and Science of the Russian Federation (Goszadanie 2014/190, Projects No. 14.Z50.31.0031 and No. 1.754.2014/K), by grant MK-5001.2015.1 of the President of the Russian Federation.

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