Abstract
The valence-subband structures of strained quantum wells are calculated using the Luttinger-Kohn Hamiltonian taking into account the strain effect. Numerical results are presented in detail for InxGa1-xAs/InP single-quantum-well structures. The strain-dependent coupling is present among the heavy-hole bands, light-hole bands, and the spin-orbit split-off bands for the strained quantum wells. Based on the results, we have shown that the axial approximation used in conventional calculations is no longer valid. We have also demonstrated that spin-orbit coupling plays a significant role in band mixing of the valence band and cannot be neglected.
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