Optically-Induced Suppression of Spin Relaxation in Two-Dimensional Electron Systems with Rashba Interaction

Details Optically-Induced Suppression of Spin Relaxation in Two-Dimensional Electron Systems with Rashba Interaction Optically-Induced Suppression of Spin Relaxation in Two-Dimensional Electron Systems with Rashba Interaction

2003-10-09

arxiv.org/abs/cond-mat/0310225v2

Phys. Rev. B 75, 165320 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.75.165320

A pulsed technique for electrons in 2D systems, in some ways analogous to spin echo in nuclear magnetic resonance, is discussed. We show that a sequence of optical below-band gap pulses can be used to suppress the electron spin relaxation due to the D'yakonov-Perel' spin relaxation mechanism. The spin relaxation time is calculated for several pulse sequences within a Monte Carlo simulation scheme. The maximum of spin relaxation time as a function of magnitude/width of the pulses corresponds to $\pi$-pulse. It is important that even relatively distant pulses efficiently suppress spin relaxation.

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