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  1. 1 Acta Physica Polonica A

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  1. 1 1998

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  1. 1 Bardyszewski W.

  2. 1 Sobol M.

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Exciton Absorption in GaN

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Sobol M., Bardyszewski W.
Acta Physica Polonica A
|
1998
|
vol. 94
|
issue 3
534-538
EN
The absorption coefficient of the wurtzite-type GaN is described in terms of three almost totally decoupled excitons A, B, C associated with split valence bands of Γ_{9}, Γ_{7} and Γ_{7} symmetries using a spherically symmetric approximation for the standard effective-mass Hamiltonian. The excitonic equations are solved within the subspace of optically active states of s-symmetry. The effects of crystal field and spin-orbit coupling are discussed. The results show that the spherical approximation is in perfect agreement with experimental findings.
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