Radial Spin Helix in Two-Dimensional Electron Systems with Rashba Spin-Orbit Coupling

Abstract

We suggest a long-lived spin polarization structure, a radial spin helix, and study its relaxation dynamics. For this purpose, starting with a simple and physically clear consideration of spin transport, we derive a system of equations for spin polarization density and find its general solution in the axially symmetric case. It is demonstrated that the radial spin helix of a certain period relaxes slower than homogeneous spin polarization and plain spin helix. Importantly, the spin polarization at the center of the radial spin helix stays almost unchanged at short times. At longer times, when the initial non-exponential relaxation region ends, the relaxation of the radial spin helix occurs with the same time constant as that describing the relaxation of the plain spin helix.

9 pages, 7 figures

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Cited by in corpus (9)

• Memory effects in complex materials and nanoscale systems
• Two-Beam Spin Noise Spectroscopy
• Spontaneous Emergence of Persistent Spin Helix from Homogeneous Spin Polarization
• Spin relaxation in wurtzite nanowires
• Kinetics of Spin Relaxation in Wires and Channels: Boundary Spin Echo and Tachyons
• Decay of Persistent Spin Helix due to the Spin Relaxation at Boundaries
• Nonlinear spin Hall effect in GaAs (110) quantum wells
• Spin relaxation in Rashba rings
• Dynamics of Spin Relaxation in Finite-Size 2D Systems: an Exact Solution