Hanle Effect near Boundaries

Abstract

The Hanle effect describes suppression of spin polarization due to precession in a magnetic field. This is a standard spintronics tool and it gives access to the spin lifetime of samples in which spins are generated homogeneously. We examine the Hanle effect when spins are generated at a boundary of a diffusive sample by the extrinsic spin Hall effect. We show that the Hanle curve is spatially dependent and that the "apparent" spin lifetime, given by its inverse half-width, is shorter near the boundary even if the spin relaxation rate is homogenous.

4 pages, 2 figures

References in corpus (6)

• Spin current and polarization in impure 2D electron systems with spin-orbit coupling
• Theory of Spin Hall conductivity in n-doped GaAs
• Intrinsic Spin Hall Edges
• Electrical initialization and manipulation of electron spins in an L-shaped strained n-InGaAs channel
• Drift and Diffusion of Spins Generated by the Spin Hall Effect
• Spin generation away from boundaries by nonlinear transport