Effects of size quantization in the spectra and Γ − M transitions in (GaAs)m(AlAs)n(001) superlattices

Аннотация

Based on the pseudopotential method and the phenomenological model of coupling forces, electron scattering by short-wavelength phonons in the conduction band of superlattices (GaAs)_m(AlAs)_n with thin layers (n, m ≤ 10) is studied. Intervalley deformation potentials for transitions between the lower states of the Γ and M valleys of superlattices, which are analogs of the sphalerite transitions of Γ̲−X̲ and X̲−X̲̃ are calculated. The intensity of the Γ − M transitions is determined mainly by the longitudinal optical vibrations of the Al atoms and depends strongly on the mixing of the states Γ̲ and X̲. The capture of phonons and electrons in AlAs layers leads to an increase in the deformation potentials of X̲−X̲̃ transitions.

Язык оригинала	Английский
Страницы (с-по)	180-187
Число страниц	8
Журнал	Physica E: Low-Dimensional Systems and Nanostructures
Том	103
DOI	https://doi.org/10.1016/j.physe.2018.05.034
Состояние	Опубликовано - 1 сен 2018

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics

Доступ к документу

10.1016/j.physe.2018.05.034

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Effects of size quantization in the spectra and Γ − M transitions in (GaAs)_m(AlAs)_n(001) superlattices. / Grinyaev, S. N.; Nikitina, L. N.; Tyuterev, V. G.

В: Physica E: Low-Dimensional Systems and Nanostructures, Том 103, 01.09.2018, стр. 180-187.

Результат исследований: Материалы для журнала › Статья › рецензирование

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title = "Effects of size quantization in the spectra and Γ − M transitions in (GaAs)m(AlAs)n(001) superlattices",

abstract = "Based on the pseudopotential method and the phenomenological model of coupling forces, electron scattering by short-wavelength phonons in the conduction band of superlattices (GaAs)m(AlAs)n with thin layers (n, m ≤ 10) is studied. Intervalley deformation potentials for transitions between the lower states of the Γ and M valleys of superlattices, which are analogs of the sphalerite transitions of Γ̲−X̲ and X̲−{\~X}̲ are calculated. The intensity of the Γ − M transitions is determined mainly by the longitudinal optical vibrations of the Al atoms and depends strongly on the mixing of the states Γ̲ and X̲. The capture of phonons and electrons in AlAs layers leads to an increase in the deformation potentials of X̲−{\~X}̲ transitions.",

keywords = "Binary superlattices, Electron-phonon interaction, Intervalley transitions",

author = "Grinyaev, {S. N.} and Nikitina, {L. N.} and Tyuterev, {V. G.}",

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T1 - Effects of size quantization in the spectra and Γ − M transitions in (GaAs)m(AlAs)n(001) superlattices

AU - Grinyaev, S. N.

AU - Nikitina, L. N.

AU - Tyuterev, V. G.

PY - 2018/9/1

Y1 - 2018/9/1

N2 - Based on the pseudopotential method and the phenomenological model of coupling forces, electron scattering by short-wavelength phonons in the conduction band of superlattices (GaAs)m(AlAs)n with thin layers (n, m ≤ 10) is studied. Intervalley deformation potentials for transitions between the lower states of the Γ and M valleys of superlattices, which are analogs of the sphalerite transitions of Γ̲−X̲ and X̲−X̲̃ are calculated. The intensity of the Γ − M transitions is determined mainly by the longitudinal optical vibrations of the Al atoms and depends strongly on the mixing of the states Γ̲ and X̲. The capture of phonons and electrons in AlAs layers leads to an increase in the deformation potentials of X̲−X̲̃ transitions.

AB - Based on the pseudopotential method and the phenomenological model of coupling forces, electron scattering by short-wavelength phonons in the conduction band of superlattices (GaAs)m(AlAs)n with thin layers (n, m ≤ 10) is studied. Intervalley deformation potentials for transitions between the lower states of the Γ and M valleys of superlattices, which are analogs of the sphalerite transitions of Γ̲−X̲ and X̲−X̲̃ are calculated. The intensity of the Γ − M transitions is determined mainly by the longitudinal optical vibrations of the Al atoms and depends strongly on the mixing of the states Γ̲ and X̲. The capture of phonons and electrons in AlAs layers leads to an increase in the deformation potentials of X̲−X̲̃ transitions.

KW - Binary superlattices

KW - Electron-phonon interaction

KW - Intervalley transitions

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