Electric field control of spin-orbit splittings in GaAs/AlGaAs coupled quantum wells

Abstract

Electron spin dynamics is investigated in n-i-n GaAs/AlGaAs coupled quantum wells. The electron spin dephasing time is measured as a function of an external electrical bias under resonant excitation of the 1sHH intrawell exciton using a time-resolved Kerr rotation technique. It is found a strong electron spin dephasing time anisotropy caused by an interference of the structure inversion asymmetry and the bulk inversion asymmetry. This anisotropy is shown to be controlled by an electrical bias. A theoretical analysis of electron spin dephasing time anisotropy is developed. The ratio of Rashba and Dresselhaus spin splittings is studied as a function of applied bias.

4 pages, 3 figures

References in corpus (9)

• Experimental Separation of Rashba and Dresselhaus Spin-Splittings in Semiconductor Quantum Wells
• Measurement of Rashba and Dresselhaus spin-orbit magnetic fields
• Giant Spin Relaxation Anisotropy in Zinc-Blende Heterostructures
• Spin Relaxation Anisotropy in Two-Dimensional Semiconductor Systems
• Rashba and Dresselhaus Spin-Splittings in Semiconductor Quantum Wells Measured by Spin Photocurrents
• High temperature gate control of quantum well spin memory
• Observation of Spin Relaxation Anisotropy in Semiconductor Quantum Wells
• Detection of large magneto-anisotropy of electron spin dephasing in a high-mobility two-dimensional electron system in a $[001]$ GaAs/AlGaAs quantum well
• Electron Density Dependence of in-plane Spin Relaxation Anisotropy in GaAs/AlGaAs Two-Dimensional Electron Gas

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• Coherent spin dynamics of electrons and holes in semiconductor quantum wells and quantum dots under periodical optical excitation: resonant spin amplification versus spin mode-locking
• Role of linear and cubic terms for the drift-induced Dresselhaus spin-orbit splitting in a two-dimensional electron gas
• Spin-orbit fields in asymmetric (001) quantum wells
• Complexes of dipolar excitons in layered quasi-two-dimensional nanostructures
• Optical activity of quantum wells
• Growth Direction Dependence of the Electron Spin Dynamics in {111} GaAs Quantum Wells
• Spin-orbit interaction and spin relaxation in a two-dimensional electron gas
• Experimental determination of Rashba and Dresselhaus parameters and $g^{\ast }$-factor anisotropy via Shubnikov-de Haas oscillations
• Coherent transport and manipulation of spins in indirect exciton nanostructures
• Hole spin dynamics and hole $g$ factor anisotropy in coupled quantum well systems
• Control of Spin Relaxation Anisotropy by Spin-Orbit-Coupled Diffusive Spin Motion
• Electrical control of spin relaxation anisotropy during drift transport in a two-dimensional electron gas
• Spin-orbit Hanle effect in high-mobility quantum wells