Anomalous spin polarization of GaAs two-dimensional hole systems.
(2005) Physical Review B, Condensed matter and materials physics — Vol. 72, p. 195321 (2005)
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- Abstract
- We report measurements and calculations of the spin-subband depopulation, induced by a parallel magnetic field, of dilute GaAs two-dimensional 2D hole systems. The results reveal that the shape of the confining potential dramatically affects the values of an in-plane magnetic field at which the upper spin subband is depopulated. Most surprisingly, unlike 2D electron systems, the carrier-carrier interaction in 2D hole systems does not significantly enhance the spin susceptibility. We interpret our findings using a multipole expansion of the spin density matrix, and suggest that the suppression of the enhancement is related to the holes’ band structure and effective spin j=3/2.
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Citations
Winkler, R., Tutuc, E., Papadakis, S. J., Melinte, S., Shayegan, M., Wasserman, D., & Lyon, S. A. (2005). Anomalous spin polarization of GaAs two-dimensional hole systems. Physical Review B, Condensed matter and materials physics, 72, 195321. https://doi.org/10.1103/PhysRevB.72.195321 (Original work published 2005)