Exciton-exciton and exciton–charge carrier interaction and exciton collisional broadening in GaAs/AlGaAs quantum wells

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Exciton-exciton and exciton–charge carrier interaction and exciton collisional broadening in GaAs/AlGaAs quantum wells. / Gribakin, B. F. ; Khramtsov, E. S. ; Trifonov, A. V. ; Ignatiev, I. V. .

In: Physical Review B, Vol. 104, No. 20, 205302, 15.11.2021.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{7e1fcf97491c45608d31f9635f4dd06e,

title = "Exciton-exciton and exciton–charge carrier interaction and exciton collisional broadening in GaAs/AlGaAs quantum wells",

abstract = "Exciton-quasiparticle interactions govern the optical nonlinear response of heretostructures at the exciton transitions. We theoretically analyze the exciton-exciton, exciton-electron, and exciton-hole interactions in heterostructures with GaAs/AlGaAs quantum wells (QWs), however, our theoretical approach can be applied to other types of heterostructures. The exciton-quasiparticle scattering amplitudes are calculated in the framework of the two-particle Hartree-Fock approximation. The exchange interaction, which is mainly responsible for the scattering, is modeled using microscopically calculated exciton wave functions. The corresponding exchange interaction constants are determined as a function of quantum well width. The spin-dependent exciton-quasiparticle elastic scattering matrix elements are used to obtain the collisional broadening of the exciton transition within the Born approximation as a function of the areal density of the respective quasiparticles for QWs of various widths. The obtained density dependences of the collisional nonradiative broadening can be used to estimate the exciton and charge carrier densities in optical experiments.",

keywords = "DIRECT SEMICONDUCTORS, ENERGY, EXCHANGE INTERACTION, GAAS, GAS, MANY-BODY THEORY, RELAXATION, SCATTERING",

author = "Gribakin, {B. F.} and Khramtsov, {E. S.} and Trifonov, {A. V.} and Ignatiev, {I. V.}",

year = "2021",

month = nov,

day = "15",

doi = "10.1103/PhysRevB.104.205302",

language = "English",

volume = "104",

journal = "Physical Review B-Condensed Matter",

issn = "1098-0121",

publisher = "American Physical Society",

number = "20",

}

RIS

TY - JOUR

T1 - Exciton-exciton and exciton–charge carrier interaction and exciton collisional broadening in GaAs/AlGaAs quantum wells

AU - Gribakin, B. F.

AU - Khramtsov, E. S.

AU - Trifonov, A. V.

AU - Ignatiev, I. V.

PY - 2021/11/15

Y1 - 2021/11/15

N2 - Exciton-quasiparticle interactions govern the optical nonlinear response of heretostructures at the exciton transitions. We theoretically analyze the exciton-exciton, exciton-electron, and exciton-hole interactions in heterostructures with GaAs/AlGaAs quantum wells (QWs), however, our theoretical approach can be applied to other types of heterostructures. The exciton-quasiparticle scattering amplitudes are calculated in the framework of the two-particle Hartree-Fock approximation. The exchange interaction, which is mainly responsible for the scattering, is modeled using microscopically calculated exciton wave functions. The corresponding exchange interaction constants are determined as a function of quantum well width. The spin-dependent exciton-quasiparticle elastic scattering matrix elements are used to obtain the collisional broadening of the exciton transition within the Born approximation as a function of the areal density of the respective quasiparticles for QWs of various widths. The obtained density dependences of the collisional nonradiative broadening can be used to estimate the exciton and charge carrier densities in optical experiments.

AB - Exciton-quasiparticle interactions govern the optical nonlinear response of heretostructures at the exciton transitions. We theoretically analyze the exciton-exciton, exciton-electron, and exciton-hole interactions in heterostructures with GaAs/AlGaAs quantum wells (QWs), however, our theoretical approach can be applied to other types of heterostructures. The exciton-quasiparticle scattering amplitudes are calculated in the framework of the two-particle Hartree-Fock approximation. The exchange interaction, which is mainly responsible for the scattering, is modeled using microscopically calculated exciton wave functions. The corresponding exchange interaction constants are determined as a function of quantum well width. The spin-dependent exciton-quasiparticle elastic scattering matrix elements are used to obtain the collisional broadening of the exciton transition within the Born approximation as a function of the areal density of the respective quasiparticles for QWs of various widths. The obtained density dependences of the collisional nonradiative broadening can be used to estimate the exciton and charge carrier densities in optical experiments.

KW - DIRECT SEMICONDUCTORS

KW - ENERGY

KW - EXCHANGE INTERACTION

KW - GAAS

KW - GAS

KW - MANY-BODY THEORY

KW - RELAXATION

KW - SCATTERING

UR - http://www.scopus.com/inward/record.url?scp=85119211058&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/a48ef2de-b34d-347d-baee-86292e5c05c2/

U2 - 10.1103/PhysRevB.104.205302

DO - 10.1103/PhysRevB.104.205302

M3 - Article

VL - 104

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 20

M1 - 205302

ER -

ID: 87936654