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- W2765500630 abstract "Abstract The total and binding energies of excitons in step-like asymmetric quantum wells made of zincblende GaN/InxlGa(1−xl)N/InxrGa(1−xr)N/GaN are theoretically reported. It is discussed how the asymmetry in the carrier confinement leads to singular behaviors in the exciton binding energy, allowing to observe both direct and indirect exciton states in the heterostructure. The study is carried out with the use of the effective mass approximation. The effects of strain are taken into account and a comparison of the results obtained for both strained and unstrained situations is presented. Exciton energy shows a decreasing behavior when the size of the effective confinement region is augmented. The total exciton energy as well as the binding energy are reported as functions of the indium concentration and quantum well width. In addition, the results of the calculation of the photoluminescence peak are presented. For this latter quantity, our results for the limiting case of a single zinc-blende GaN/InGaN quantum well show very good agreement with published experimental ones." @default.
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- W2765500630 date "2017-12-01" @default.
- W2765500630 modified "2023-09-26" @default.
- W2765500630 title "States of direct and indirect excitons in strained zinc-blende GaN/InGaN asymmetric quantum wells" @default.
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- W2765500630 doi "https://doi.org/10.1016/j.spmi.2017.10.017" @default.
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