Spin-orbit Hanle effect in high-mobility quantum wells

Abstract

We study the depolarization of optically oriented electrons in quantum wells subjected to an in-plane magnetic field and show that the Hanle curve drastically depends on the carrier mobility. In low-mobility structures, the Hanle curve is described by a Lorentzian with the width determined by the effective g-factor and the spin lifetime. In contrast, the magnetic field dependence of spin polarization in high-mobility quantum wells is nonmonotonic: The spin polarization rises with the magnetic field induction at small fields, reaches maximum and then decreases. We show that the position of the Hanle curve maximum can be used to directly measure the spin-orbit Rashba/Dresselhaus magnetic field.

4 pages, 3 figures

References in corpus (8)

• Spin dynamics in semiconductors
• Oscillatory D'yakonov-Perel' spin dynamics in two dimensional electron gases
• Spin-orbit fields in asymmetric (001) 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
• Two-dimensional imaging of the spin-orbit effective magnetic field
• Spin polarization decay in spin-1/2 and spin-3/2 systems
• Effect of structure anisotropy on low temperature spin dynamics in quantum wells
• Cyclotron effect on coherent spin precession of two-dimensional electrons

Cited by in corpus (3)

• Spatiotemporal spin fluctuations caused by spin-orbit-coupled Brownian motion
• Coherent spin dynamics of excitons in strained monolayer semiconductors
• Electron spin dephasing in two-dimensional systems with anisotropic scattering