2006/10/03 by C. Weber, C. P. Weber, J. Orenstein +5 · 1 citation
Chemistry · Physics and Astronomy · #Chemistry #Condensed matter physics #Diffusion #Electron #Fermi gas #Grating #Optics #Physics #Physics of Superconductivity and Magnetism #Polarization (electrochemistry) #Quantum and electron transport phenomena #Quantum mechanics #Relaxation (psychology) #Semiconductor Quantum Structures and Devices #Spectroscopy #Spin (aerodynamics) #Spin diffusion #Spin polarization #Spin wave #Spin–orbit interaction #Wave vector #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.98.076604
published as Phys. Rev. Lett. 98, 076604 (2007) · 5 pages, 3 figures
arxiv created 2006/10/03 · openalex publication_date 2007/02/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We describe measurements of spin dynamics in the two-dimensional electron gas in GaAs/GaAlAs quantum wells. Optical techniques, including transient spin-grating spectroscopy, are used to probe the relaxation rates of spin polarization waves in the wave vector range from zero to 6x10(4) cm-1. We find that the spin polarization lifetime is maximal at a nonzero wave vector, in contrast with expectations based on ordinary spin diffusion, but in quantitative agreement with recent theories that treat diffusion in the presence of spin-orbit coupling.