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- W4320342001 abstract "Most semiconductors, in particular III-V compounds, have a complex valence band structure near the band edge, due to degeneracy at the zone center. One peculiar feature is the warping of the electronic dispersion relations, which are not isotropic even in the vicinity of the band edge. When the exciton, all important for the semiconductor optical properties, is considered, this problem is usually handled by using some kind of angular averaging procedure, that would restore the isotropy of the hole effective dispersion relations. In the present paper, we consider the problem of the exciton ground-state energy for semiconductors with zinc-blende crystal structure, and we solve it exactly by a numerical treatment, taking fully into account the warping of the valence band. In the resulting four-dimensional problem, we first show exactly that the exciton ground state is fourfold degenerate. We then explore the ground-state energy across the full range of allowed Luttinger parameters. We find that the correction due to warping may in principle be quite large. However, for the semiconductors with available data for the band structure we have considered, the correction turns out to be in the $10% - 15%$ range." @default.
- W4320342001 created "2023-02-13" @default.
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- W4320342001 date "2023-02-02" @default.
- W4320342001 modified "2023-09-23" @default.
- W4320342001 title "Exciton ground-state energy with full hole warping structure" @default.
- W4320342001 doi "https://doi.org/10.48550/arxiv.2302.01257" @default.
- W4320342001 hasPublicationYear "2023" @default.
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