Exact numeric calculation of nonparabolicity of exciton dispersion in semiconductors with degenerate valence band

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Exact numeric calculation of nonparabolicity of exciton dispersion in semiconductors with degenerate valence band. / Логинов, Дмитрий Константинович.

в: Physica B: Condensed Matter, Том 715, 417534, 15.10.2025.

Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование

BibTeX

@article{4fdf02147e2e43969c698b5df38934dd,

title = "Exact numeric calculation of nonparabolicity of exciton dispersion in semiconductors with degenerate valence band",

abstract = "An exact numerical calculation of the exciton dispersion in GaAs is performed, including all possible terms of the exciton Hamiltonian that arise from the electron and hole Hamiltonians. It is shown that the coupling of states of heavy-hole and light-hole excitons, described by the terms related to cubic anisotropy of the valence band, leads to nonparabolicity of the dispersion dependence of their energy on the wave vector. An analysis of reflection spectra of GaAs/AlGaAs heterostructures with wide quantum wells shows, however, that the states of quantisation of exciton motion observed in experiments can be described with good accuracy within a simple parabolic dispersion model. This contradiction between theory and experiment is discussed.",

keywords = "экситон, непараболичность дисперсии экситона, вырожденная валентная зона, кубическая анизотропия, exciton, non-parabolicity of exciton dispersion, degenerate valence band, cubic anisotropy, Cubic anisotropy, Exciton, Non-parabolicity of exciton dispersion, Degenerate valence band",

author = "Логинов, {Дмитрий Константинович}",

year = "2025",

month = oct,

day = "15",

doi = "10.1016/j.physb.2025.417534",

language = "English",

volume = "715",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Exact numeric calculation of nonparabolicity of exciton dispersion in semiconductors with degenerate valence band

AU - Логинов, Дмитрий Константинович

PY - 2025/10/15

Y1 - 2025/10/15

N2 - An exact numerical calculation of the exciton dispersion in GaAs is performed, including all possible terms of the exciton Hamiltonian that arise from the electron and hole Hamiltonians. It is shown that the coupling of states of heavy-hole and light-hole excitons, described by the terms related to cubic anisotropy of the valence band, leads to nonparabolicity of the dispersion dependence of their energy on the wave vector. An analysis of reflection spectra of GaAs/AlGaAs heterostructures with wide quantum wells shows, however, that the states of quantisation of exciton motion observed in experiments can be described with good accuracy within a simple parabolic dispersion model. This contradiction between theory and experiment is discussed.

AB - An exact numerical calculation of the exciton dispersion in GaAs is performed, including all possible terms of the exciton Hamiltonian that arise from the electron and hole Hamiltonians. It is shown that the coupling of states of heavy-hole and light-hole excitons, described by the terms related to cubic anisotropy of the valence band, leads to nonparabolicity of the dispersion dependence of their energy on the wave vector. An analysis of reflection spectra of GaAs/AlGaAs heterostructures with wide quantum wells shows, however, that the states of quantisation of exciton motion observed in experiments can be described with good accuracy within a simple parabolic dispersion model. This contradiction between theory and experiment is discussed.

KW - экситон

KW - непараболичность дисперсии экситона

KW - вырожденная валентная зона

KW - кубическая анизотропия

KW - exciton

KW - non-parabolicity of exciton dispersion

KW - degenerate valence band

KW - cubic anisotropy

KW - Cubic anisotropy

KW - Exciton

KW - Non-parabolicity of exciton dispersion

KW - Degenerate valence band

UR - https://www.mendeley.com/catalogue/521a7bc1-8d24-3a45-aca3-c68b63870b2a/

U2 - 10.1016/j.physb.2025.417534

DO - 10.1016/j.physb.2025.417534

M3 - Article

VL - 715

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

SN - 0921-4526

M1 - 417534

ER -

ID: 137852941