Details
| Original language | English |
|---|---|
| Article number | 041301 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 84 |
| Issue number | 4 |
| Publication status | Published - 1 Jul 2011 |
Abstract
We demonstrate by spin quantum beat spectroscopy that in undoped symmetric (110)-oriented GaAs/AlGaAs single quantum wells, even a symmetric spatial envelope wave function gives rise to an asymmetric in-plane electron Landé g-factor. The anisotropy is neither a direct consequence of the asymmetric in-plane Dresselhaus splitting nor a direct consequence of the asymmetric Zeeman splitting of the hole bands, but rather it is a pure higher-order effect that exists as well for diamond-type lattices. The measurements for various well widths are very well described within 14×14 band k•p theory and illustrate that the electron spin is an excellent meter variable for mapping out the internal-otherwise hidden-symmetries in two-dimensional systems. Fourth-order perturbation theory yields an analytical expression for the strength of the g-factor anisotropy, providing a qualitative understanding of the observed effects.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Physical Review B - Condensed Matter and Materials Physics, Vol. 84, No. 4, 041301, 01.07.2011.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Electron g-factor anisotropy in symmetric (110)-oriented GaAs quantum wells
AU - Hübner, Jens
AU - Kunz, S.
AU - Oertel, S.
AU - Schuh, D.
AU - Pochwała, M.
AU - Duc, H. T.
AU - Förstner, J.
AU - Meier, T.
AU - Oestreich, Michael
PY - 2011/7/1
Y1 - 2011/7/1
N2 - We demonstrate by spin quantum beat spectroscopy that in undoped symmetric (110)-oriented GaAs/AlGaAs single quantum wells, even a symmetric spatial envelope wave function gives rise to an asymmetric in-plane electron Landé g-factor. The anisotropy is neither a direct consequence of the asymmetric in-plane Dresselhaus splitting nor a direct consequence of the asymmetric Zeeman splitting of the hole bands, but rather it is a pure higher-order effect that exists as well for diamond-type lattices. The measurements for various well widths are very well described within 14×14 band k•p theory and illustrate that the electron spin is an excellent meter variable for mapping out the internal-otherwise hidden-symmetries in two-dimensional systems. Fourth-order perturbation theory yields an analytical expression for the strength of the g-factor anisotropy, providing a qualitative understanding of the observed effects.
AB - We demonstrate by spin quantum beat spectroscopy that in undoped symmetric (110)-oriented GaAs/AlGaAs single quantum wells, even a symmetric spatial envelope wave function gives rise to an asymmetric in-plane electron Landé g-factor. The anisotropy is neither a direct consequence of the asymmetric in-plane Dresselhaus splitting nor a direct consequence of the asymmetric Zeeman splitting of the hole bands, but rather it is a pure higher-order effect that exists as well for diamond-type lattices. The measurements for various well widths are very well described within 14×14 band k•p theory and illustrate that the electron spin is an excellent meter variable for mapping out the internal-otherwise hidden-symmetries in two-dimensional systems. Fourth-order perturbation theory yields an analytical expression for the strength of the g-factor anisotropy, providing a qualitative understanding of the observed effects.
UR - http://www.scopus.com/inward/record.url?scp=79961237188&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.84.041301
DO - 10.1103/PhysRevB.84.041301
M3 - Article
AN - SCOPUS:79961237188
VL - 84
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 1098-0121
IS - 4
M1 - 041301
ER -