Spin relaxation in low-dimensional systems

Abstract

We review some of the newest findings on the spin dynamics of carriers and excitons in GaAs/GaAlAs quantum wells. In intrinsic wells, where the optical properties are dominated by excitonic effects, we show that exciton-exciton interaction produces a breaking of the spin degeneracy in two-dimensional semiconductors. In doped wells, the two spin components of an optically created two-dimensional electron gas are well described by Fermi-Dirac distributions with a common temperature but different chemical potentials. The rate of the spin depolarization of the electron gas is found to be independent of the mean electron kinetic energy but accelerated by thermal spreading of the carriers.

1 PDF file, 13 eps figures, Proceedings of the 1998 International Workshop on Nanophysics and Electronics (NPE-98)- Lecce (Italy)

References in corpus (3)

• Ultraslow Electron Spin Dynamics in GaAs Quantum Wells Probed by Optically Pumped NMR
• Spin splitting in a polarized quasi-two-dimensional exciton gas
• Polarized interacting exciton gas in quantum wells and bulk semiconductors

Cited by in corpus (17)

• Spin dynamics in semiconductors
• Theory of Two-Dimensional Spatially Indirect Equilibrium Exciton Condensates
• Time-Reversal Symmetry-Breaking Nematic Insulators near Quantum Spin Hall Phase Transitions
• Semiclassical kinetic theory of electron spin relaxation in semiconductors
• A Room-temperature Spin-polarized Polariton Laser
• Spin-polarized lasing in a highly photoexcited semiconductor microcavity
• Effects of fermion exchanges on the polarization of exciton condensates
• Optical Spin Polarization Dynamics in GaSe Nanoslabs
• Near Unity Optical Spin Polarization in GaSe Nanoslabs
• Tracking Dark Excitons with Exciton Polaritons in Semiconductor Microcavities
• Exciton spin noise in quantum wells
• Exciton spin dynamics in GaSe
• Screening nearest-neighbor interactions in networks of exciton-polariton condensates through spin orbit coupling
• Optical signatures of a fully dark exciton condensate
• Electron spin relaxation in $p$-type GaAs quantum wells
• Vertical magneto-tunneling through a quantum dot and the density of states of small electronic systems
• Discrete chiral ballistic polariton laser