Spin accumulation in diffusive conductors with Rashba and Dresselhaus spin-orbit interaction

Warning The system is temporarily closed to updates for reporting purpose.

Duckheim, Mathias and Loss, Daniel and Scheid, Matthias and Richter, Klaus and Adagideli, İnanç and Jacquod, Philippe (2010) Spin accumulation in diffusive conductors with Rashba and Dresselhaus spin-orbit interaction. Physical Review B: Condensed Matter and Materials Physics, 81 (8). ISSN 1098-0121

This is the latest version of this item.

PDF (This is a RoMEO green publisher -- author can archive post-print (ie final draft post-refereeing) and publisher's version/PDF) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader

Official URL: http://dx.doi.org/10.1103/PhysRevB.81.085303


We calculate the electrically induced spin accumulation in diffusive systems due to both Rashba (with strength $\alpha)$ and Dresselhaus (with strength $\beta)$ spin-orbit interaction. Using a diffusion equation approach we find that magnetoelectric effects disappear and that there is thus no spin accumulation when both interactions have the same strength, $\alpha=\pm \beta$. In thermodynamically large systems, the finite spin accumulation predicted by Chaplik, Entin and Magarill, [Physica E {\bf 13}, 744 (2002)] and by Trushin and Schliemann [Phys. Rev. B {\bf 75}, 155323 (2007)] is recovered an infinitesimally small distance away from the singular point $\alpha=\pm \beta$. We show however that the singularity is broadened and that the suppression of spin accumulation becomes physically relevant (i) in finite-sized systems of size $L$, (ii) in the presence of a cubic Dresselhaus interaction of strength $\gamma$, or (iii) for finite frequency measurements. We obtain the parametric range over which the magnetoelectric effect is suppressed in these three instances as (i) $|\alpha|-|\beta| \lesssim 1/mL$, (ii)$|\alpha|-|\beta| \lesssim \gamma p_{\rm F}^2$, and (iii) $|\alpha|-|\beta| \lesssiM \sqrt{\omega/m p_{\rm F}\ell}$ with $\ell$ the elastic mean free path and $p_{\rm F}$ the Fermi momentum. We attribute the absence of spin accumulation close to $\alpha=\pm \beta$ to the underlying U (1) symmetry. We illustrate and confirm our predictions numerically.

Item Type:Article
Subjects:Q Science > Q Science (General)
Q Science > QC Physics > QC501-766 Electricity and magnetism
Q Science > QC Physics > QC176-176.9 Solids. Solid state physics
Q Science > QC Physics
ID Code:13761
Deposited By:İnanç Adagideli
Deposited On:16 Feb 2010 11:20
Last Modified:24 Jul 2019 15:42

Available Versions of this Item

Repository Staff Only: item control page