This article is cited in 2 papers

Low dimensional systems

Evolution of the spectral parameters of quasiparticles in an open symmetrical three-barrier resonant tunneling nanostructure

N. V. Tkach, J. A. Seti

Chernivtsi National University named after Yuriy Fedkovych

Abstract: The spectral parameters (resonance energies and resonance widths) of quasi-stationary states in an open symmetrical three-barrier resonant tunneling nanostructure have been theoretically calculated in terms of the model of spatially dependent effective masses and rectangular potentials of quasiparticles (electrons, holes, excitons) by using the methods of transmission coefficient, scattering matrix, and probability distribution function. The evolution of the spectral parameters of quasi-stationary states of quasiparticles as a function of the variation in the geometric sizes of the nanosystem has been calculated and analyzed for the open three-barrier resonant tunneling structure consisting of three barriers (GaAs) and two wells (In$_{0.25}$Ga$_{0.75}$As) as an example. It has been established that the experimental and theoretical results are in satisfactory agreement for the model without fitting parameters in the case of a heavy exciton.

Received: 04.03.2010
Accepted: 20.05.2010

 English version: Physics of the Solid State, 2011, 53:3, 590–598

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