Details
| Original language | English |
|---|---|
| Article number | 67010 |
| Journal | epl |
| Volume | 96 |
| Issue number | 6 |
| Publication status | Published - 6 Dec 2011 |
Abstract
We show that a fast electron spin relaxation time in (110)-oriented GaAs/AlGaAs quantum wells is governed by the presence of excitons at low temperatures and intermediate excitation densities. The electron loses its spin orientation within an exciton due to the long-range part of the exciton anisotropic spin exchange interaction and unveils excitonic signatures within the many particle electron-hole system. The temperature-dependent time- and polarization-resolved photoluminescence measurements span five decades of carrier density, comprise the transition from localized excitons over quasi-free excitons to an electron-hole plasma, and reveal strong excitonic signatures even at relatively high densities and temperatures.
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In: epl, Vol. 96, No. 6, 67010, 06.12.2011.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Electron spin relaxation as tracer of excitons in a two-dimensional electron-hole plasma inside a (110)-GaAs quantum well
AU - Oertel, S.
AU - Kunz, S.
AU - Schuh, D.
AU - Wegscheider, W.
AU - Hübner, Jens
AU - Oestreich, Michael
PY - 2011/12/6
Y1 - 2011/12/6
N2 - We show that a fast electron spin relaxation time in (110)-oriented GaAs/AlGaAs quantum wells is governed by the presence of excitons at low temperatures and intermediate excitation densities. The electron loses its spin orientation within an exciton due to the long-range part of the exciton anisotropic spin exchange interaction and unveils excitonic signatures within the many particle electron-hole system. The temperature-dependent time- and polarization-resolved photoluminescence measurements span five decades of carrier density, comprise the transition from localized excitons over quasi-free excitons to an electron-hole plasma, and reveal strong excitonic signatures even at relatively high densities and temperatures.
AB - We show that a fast electron spin relaxation time in (110)-oriented GaAs/AlGaAs quantum wells is governed by the presence of excitons at low temperatures and intermediate excitation densities. The electron loses its spin orientation within an exciton due to the long-range part of the exciton anisotropic spin exchange interaction and unveils excitonic signatures within the many particle electron-hole system. The temperature-dependent time- and polarization-resolved photoluminescence measurements span five decades of carrier density, comprise the transition from localized excitons over quasi-free excitons to an electron-hole plasma, and reveal strong excitonic signatures even at relatively high densities and temperatures.
UR - http://www.scopus.com/inward/record.url?scp=83755161338&partnerID=8YFLogxK
U2 - 10.1209/0295-5075/96/67010
DO - 10.1209/0295-5075/96/67010
M3 - Article
AN - SCOPUS:83755161338
VL - 96
JO - epl
JF - epl
SN - 0295-5075
IS - 6
M1 - 67010
ER -