Electron Density Dependence of in-plane Spin Relaxation Anisotropy in GaAs/AlGaAs Two-Dimensional Electron Gas

Abstract

We investigated the spin dynamics of two-dimensional electrons in (001) GaAs/AlGaAs heterostructure using the time resolved Kerr rotation technique under a transverse magnetic field. The in-plane spin lifetime is found to be anisotropic below 150k due to the interference of Rashba and Dresselhaus spin-orbit coupling and D'yakonov-Perel' spin relaxation. The ratio of in-plane spin lifetimes is measured directly as a function of temperature and pump power, showing that the electron density in 2DEG channel strongly affects the Rashba spin-orbit coupling.

3 pages, 2 figures

References in corpus (8)

• Non-ballistic spin field-effect transistor
• An Exact SU(2) Symmetry and Persistent Spin Helix in a Spin-Orbit Coupled System
• Experimental Separation of Rashba and Dresselhaus Spin-Splittings in Semiconductor Quantum Wells
• Giant Spin Relaxation Anisotropy in Zinc-Blende Heterostructures
• Anomalous Spin Dephasing in (110) GaAs Quantum Wells: Anisotropy and Intersubband Effects
• Observation of Spin Relaxation Anisotropy in Semiconductor Quantum Wells
• Non-diffusive spin dynamics in a two-dimensional electron gas
• Anisotropic spin splitting and spin relaxation in asymmetric zinc-blende semiconductor quantum structures

Cited by in corpus (13)

• Spin dynamics in semiconductors
• Exciton Valley Dynamics probed by Kerr Rotation in WSe2 Monolayers
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• Detection of large magneto-anisotropy of electron spin dephasing in a high-mobility two-dimensional electron system in a $[001]$ GaAs/AlGaAs quantum well
• Electric field control of spin-orbit splittings in GaAs/AlGaAs coupled quantum wells
• Anisotropic spin relaxation revealed by resonant spin amplification in (110) GaAs quantum wells
• Density dependence of spin relaxation in GaAs quantum well at room temperature
• Growth Direction Dependence of the Electron Spin Dynamics in {111} GaAs Quantum Wells
• Electric-field induced spin excitations in two-dimensional spin-orbit coupled systems
• Hole spin relaxation in $p$-type (111) GaAs quantum wells
• Spin dynamics in high-mobility two-dimensional electron systems
• Large anisotropic spin relaxation time of exciton bound to donor states in triple quantum wells
• Electron Spin Dephasing and Optical Pumping of Nuclear Spins in GaN