Spin Pumping from Rashba Spin–Orbit-Coupled Electron Systems Driven by Electric Dipole Spin Resonance

Kiminori Hattori
2008 Journal of the Physical Society of Japan  
This paper analyzes spin currents pumped from Rashba spin-orbit coupled two-dimensional electron systems in electric dipole spin resonance (EDSR), on the basis of the nonequilibrium Green's function formalism. In the ballistic transport regime, the EDSR-induced spin pumping efficiently occurs for the finite-sized system smaller than the spin precession length. In the diffusive transport regime, the spin pumping is remarkably enhanced with increasing static disorder while the pumped spin
more » ... pumped spin dephases to a certain degree due to the D'yakonov-Perel' mechanism. The spin dephasing is controlled by reducing the system size compared with the precession length irrespective of the degree of disorder.
doi:10.1143/jpsj.77.034707 fatcat:m7vemfqxnzdblhc4tt6cb2qhhq