Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 77, Issue 3, Pages -Publisher
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.77.034707
Keywords
spin pumping; spin-orbit coupling; electric dipole spin resonance; two-dimensional system; spin transport; spin relaxation
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This paper analyzes spin currents pumped from Rashba spin-orbit coupled two-dimentional electron systems in electric dipole spin resonance (EDSR). on the basis nonequilibrium Green's function formalism. In the ballistic transport regime, the EDSR-iduced spin pumping efficiently occurs for the finite-sized system smaller than the spin precession length. In the diffusive transport regie, the spin pumping is remarkably enhanced with increasing static disorder while the 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.
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