Exciton spin dynamics in GaAs quantum wells

S. Adachi; T. Miyashita; S. Takeyama; Y. Takagi; A. Tackeuchi

doi:10.1016/S0022-2313(96)00139-1

Exciton spin dynamics in GaAs quantum wells

S. Adachi^*, T. Miyashita, S. Takeyama, Y. Takagi, A. Tackeuchi

^*Corresponding author for this work

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

36 Citations (Scopus)

Abstract

We have investigated the temperature dependence of the exciton spin relaxation between 10 and 300 K in undoped GaAs quantum wells by using the nonlinear transmission pump-probe and the four-wave-mixing techniques. The electron spin relaxation rate above 40 K is found to be proportional to the product of the temperature and the momentum relaxation time, which indicates that the D'yakonov-Perel' interaction governs the spin-flip dynamics. The temperature independence below 30 K is considered to be due to the band-mixing effect that determines the hole spin relaxation, and the spin exchange is effective to the exciton spin relaxation in these temperatures.

Original language	English
Pages (from-to)	307-308
Number of pages	2
Journal	Journal of Luminescence
Volume	72-74
DOIs	https://doi.org/10.1016/S0022-2313(96)00139-1
Publication status	Published - 1997 Jun
Externally published	Yes

Keywords

Exciton spin relaxation
Gaas
Momentum relaxation
Quantum wells

ASJC Scopus subject areas

Biophysics
Biochemistry
Chemistry(all)
Atomic and Molecular Physics, and Optics
Condensed Matter Physics

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10.1016/S0022-2313(96)00139-1

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title = "Exciton spin dynamics in GaAs quantum wells",

abstract = "We have investigated the temperature dependence of the exciton spin relaxation between 10 and 300 K in undoped GaAs quantum wells by using the nonlinear transmission pump-probe and the four-wave-mixing techniques. The electron spin relaxation rate above 40 K is found to be proportional to the product of the temperature and the momentum relaxation time, which indicates that the D'yakonov-Perel' interaction governs the spin-flip dynamics. The temperature independence below 30 K is considered to be due to the band-mixing effect that determines the hole spin relaxation, and the spin exchange is effective to the exciton spin relaxation in these temperatures.",

keywords = "Exciton spin relaxation, Gaas, Momentum relaxation, Quantum wells",

author = "S. Adachi and T. Miyashita and S. Takeyama and Y. Takagi and A. Tackeuchi",

year = "1997",

month = jun,

doi = "10.1016/S0022-2313(96)00139-1",

language = "English",

volume = "72-74",

pages = "307--308",

journal = "Journal of Luminescence",

issn = "0022-2313",

publisher = "Elsevier",

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TY - JOUR

T1 - Exciton spin dynamics in GaAs quantum wells

AU - Adachi, S.

AU - Miyashita, T.

AU - Takeyama, S.

AU - Takagi, Y.

AU - Tackeuchi, A.

PY - 1997/6

Y1 - 1997/6

N2 - We have investigated the temperature dependence of the exciton spin relaxation between 10 and 300 K in undoped GaAs quantum wells by using the nonlinear transmission pump-probe and the four-wave-mixing techniques. The electron spin relaxation rate above 40 K is found to be proportional to the product of the temperature and the momentum relaxation time, which indicates that the D'yakonov-Perel' interaction governs the spin-flip dynamics. The temperature independence below 30 K is considered to be due to the band-mixing effect that determines the hole spin relaxation, and the spin exchange is effective to the exciton spin relaxation in these temperatures.

AB - We have investigated the temperature dependence of the exciton spin relaxation between 10 and 300 K in undoped GaAs quantum wells by using the nonlinear transmission pump-probe and the four-wave-mixing techniques. The electron spin relaxation rate above 40 K is found to be proportional to the product of the temperature and the momentum relaxation time, which indicates that the D'yakonov-Perel' interaction governs the spin-flip dynamics. The temperature independence below 30 K is considered to be due to the band-mixing effect that determines the hole spin relaxation, and the spin exchange is effective to the exciton spin relaxation in these temperatures.

KW - Exciton spin relaxation

KW - Gaas

KW - Momentum relaxation

KW - Quantum wells

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U2 - 10.1016/S0022-2313(96)00139-1

DO - 10.1016/S0022-2313(96)00139-1

M3 - Article

AN - SCOPUS:0031164410

SN - 0022-2313

VL - 72-74

SP - 307

EP - 308

JO - Journal of Luminescence

JF - Journal of Luminescence

ER -

Exciton spin dynamics in GaAs quantum wells

Abstract

Keywords

ASJC Scopus subject areas

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