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Heavy Hole—Light Hole Splitting in GaAs/AlAs Superlattices
Author(s) -
Munzar D.
Publication year - 1993
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221750211
Subject(s) - superlattice , valence band , effective mass (spring–mass system) , condensed matter physics , quantum well , spin–orbit interaction , electronic band structure , physics , energy level splitting , coupling (piping) , materials science , band gap , optics , quantum mechanics , laser , metallurgy
Eppenga's six‐band k · p model for the description of the valence band structure of GaAs/AlAs quantum wells is modified for the k ⟂ = 0 states in GaAs/AlAs superlattices. The model takes into account the coupling between the light holes and the spin—orbit split‐off holes and yields a very good agreement between experimental and calculated values of the splitting between the first heavy and light hole energy levels, which is not obtained in the simple effective mass approximation.