2006/06/30 by D. C. Marinescu · 1 citation
Physics and Astronomy · #Atomic and Subatomic Physics Research #Quantum and electron transport phenomena #Quantum optics and atomic interactions #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.97.176802
published as Phys. Rev. Lett. 97, 176802 (2006)
openalex publication_date 2006/10/26 · arxiv created 2006/11/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We calculate the dephasing time tau(phi)(B) of an electron in a two-dimensional system with a Rashba spin-orbit interaction, spin-polarized by an arbitrarily large magnetic field parallel to the layer. tau(phi)(B) is estimated from the logarithmic corrections to the conductivity within a perturbative approach that assumes weak, isotropic disorder scattering. For any value of the magnetic field, the dephasing rate changes with respect to its unpolarized-state value by a universal function whose parameter is 2E(Z)/E(SOI) (E(Z) is the Zeeman energy, while E(SOI) is the spin-orbit interaction), confirming the experimental report published in Phys. Rev. Lett. 94, 186805 (2005). In the high-field limit, when 2E(Z) >> E(SOI), the dephasing rate saturates and reaches asymptotically to a value equal to half the spin-relaxation rate.