Summary
A model version of the coherent-potential approximation (CPA) is outlined to evaluate the fundamental energy gapsΓ 15v -Γ 1c ′,Γ 15v -L 1c ,Γ 15v -X 1c of a multinary solid solution. A comparison of theoretical results with the transition energy values obtained from direct interpolation of the corresponding values of ternary alloys is presented for some composition of the solution Al1−x−y Ga x In y As at fixed lattice constants (matching the lattice constants of InP and AlAs).
Riassunto
Si presenta una versione modello dell'approssimazione del potenziale coerente per calcolare le differenze d'energia tra i livelli elettroniciΓ 15v -Γ 1c ′,Γ 15v -L 1c ,Γ 15v -X 1c di una soluzione solida multinaria III–V. I valori delle energie di transizione, per alcuni valori della composizione (x, y) della soluzione solida Al1−x−y Ga x In y As, ottenuti con il predetto metodo, sono confrontati con i valori derivati dall'interpolazione dei relativi risultati sperimentali per le soluzioni ternarie limite.
Резюме
Предлагается модельный вариант приблжения когерентного потенциала для вычисления основных знергетических щелейΓ 15v -Γ 1c ′,Γ 15v -L 1c ,Γ 15v -X 1c для миогокомпонентного твердого раствора. Проводится сравнение теоретических результатов с величинамн энергетических переходов, полученными из прямой интерполяции соответствующих величин для многокмпонентных сплавов Al1−x−y Ga x In y As при фикспрованных постоянных решетки.
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Aymerich, F., Verié, C. Electronic properties of multinary alloys. Il Nuovo Cimento D 2, 1701–1705 (1983). https://doi.org/10.1007/BF02457853
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DOI: https://doi.org/10.1007/BF02457853