Electrong-factor anisotropy in symmetric (110)-oriented GaAs quantum wells

J. Hübner, S. Kunz, S. Oertel, D. Schuh, M. Pochwała, H.T. Duc, J. Förstner, T. Meier, M. Oestreich, Physical Review B 84 (2011) 041301 (R).

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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 Land´e 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.
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Journal Title
Physical Review B
Volume
84
Issue
4
Page
041301 (R)
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Hübner J, Kunz S, Oertel S, et al. Electrong-factor anisotropy in symmetric (110)-oriented GaAs quantum wells. Physical Review B. 2011;84(4):041301 (R). doi:10.1103/physrevb.84.041301
Hübner, J., Kunz, S., Oertel, S., Schuh, D., Pochwała, M., Duc, H. T., … Oestreich, M. (2011). Electrong-factor anisotropy in symmetric (110)-oriented GaAs quantum wells. Physical Review B, 84(4), 041301 (R). https://doi.org/10.1103/physrevb.84.041301
@article{Hübner_Kunz_Oertel_Schuh_Pochwała_Duc_Förstner_Meier_Oestreich_2011, title={Electrong-factor anisotropy in symmetric (110)-oriented GaAs quantum wells}, volume={84}, DOI={10.1103/physrevb.84.041301}, number={4}, journal={Physical Review B}, publisher={American Physical Society (APS)}, author={Hübner, J. and Kunz, S. and Oertel, S. and Schuh, D. and Pochwała, M. and Duc, H. T. and Förstner, Jens and Meier, Torsten and Oestreich, M.}, year={2011}, pages={041301 (R)} }
Hübner, J., S. Kunz, S. Oertel, D. Schuh, M. Pochwała, H. T. Duc, Jens Förstner, Torsten Meier, and M. Oestreich. “Electrong-Factor Anisotropy in Symmetric (110)-Oriented GaAs Quantum Wells.” Physical Review B 84, no. 4 (2011): 041301 (R). https://doi.org/10.1103/physrevb.84.041301.
J. Hübner et al., “Electrong-factor anisotropy in symmetric (110)-oriented GaAs quantum wells,” Physical Review B, vol. 84, no. 4, p. 041301 (R), 2011.
Hübner, J., et al. “Electrong-Factor Anisotropy in Symmetric (110)-Oriented GaAs Quantum Wells.” Physical Review B, vol. 84, no. 4, American Physical Society (APS), 2011, p. 041301 (R), doi:10.1103/physrevb.84.041301.
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