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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:49 |
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Conference: Bucharest University Faculty of Physics 2015 Meeting
Section: Polymer Physics
Title:
Analytical approach for type-II semiconductor cylindrical core/shell nanowires heterostructures with wide band gaps
Authors:
Tiberius Ovidius CHECHE(1)
Affiliation:
1) Faculty of Physics, University of Bucharest, Bucharest 077125, Romania
E-mail
tiberiuscheche@yahoo.com
Keywords:
effective mass approximation, nanowires
Abstract:
An effective mass approximation is adopted to characterize the sub-band energy structure of type-II semiconductor cylindrical core/shell nanowires (CSNW) with cubic symmetry. The heteroepitaxial strain of the core-shell heterostructure is modeled by the elastic continuum approach within an isotropic treatment. The general equilibrium equation, Hooke's law and interface boundary matching condition are used in the strain modeling. The analytical results are applied to ZnTe/ZnSe, a wide band gap type-II heterostructure. Localization of the photoexcited electron-hole carriers and oscillator strength are investigated as function of the shell thickness.
References:
1. R. Peköz and J.-Y. Raty, Phys. Rev. B 84, 165444 (2011).
2. T.E. Pahomi, T.O. Cheche, Chem. Phys. Lett. 612, 33 (2014).
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