Spin-Current-Driven Spin Pumping in Rashba Spin-Orbit Coupled Systems : A Spin Torque Effect

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概要

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• There exists a direct connection between spin torque and spin current in two-dimensional electron systems with linear in momentum Rashba spin–orbit (SO) coupling. In terms of the spin-current continuity equation, we show that the spin torque of this type generates a divergent spin current due to spin injection, which we call the spin-current-driven spin pumping. We quantitatively investigate the spin pumping from SO coupled systems in contact with spin-polarized reservoirs using the nonequilibrium Green's function formalism, demonstrating that the spin torque effect efficiently produces a pure spin current which is orders of magnitude larger than the spin Hall current.

• The Physical Society of Japanの論文
• 2009-08-15

著者

• Hattori Kiminori

  Department Of Systems Innovation Graduate School Of Engineering Science Osaka University

• Hattori Kiminori

  Department of Systems Innovation, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531

関連論文

• Spin Pumping from Rashba Spin-Orbit-Coupled Electron Systems Driven by Electric Dipole Spin Resonance
• Nonequilibrium Occupancy of Dangling Bond Defects in Undoped Amorphous Silicon Studied by Subgap-Light-Induced Electron Spin Resonance
• Spin-Current-Driven Spin Pumping in Rashba Spin-Orbit Coupled Systems : A Spin Torque Effect

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