Pure spin current generation in a Rashba-Dresselhaus quantum channel
arXiv:0808.1449 · doi:10.1103/PhysRevB.78.245312
Abstract
We demonstrate a spin pump to generate pure spin current of tunable intensity and polarization in the absence of charge current. The pumping functionality is achieved by means of an ac gate voltage that modulates the Rashba constant dynamically in a local region of a quantum channel with both static Rashba and Dresselhaus spin-orbit interactions. Spin-resolved Floquet scattering matrix is calculated to analyze the whole scattering process. Pumped spin current can be divided into spin-preserved transmission and spin-flip reflection parts. These two terms have opposite polarization of spin current and are competing with each other. Our proposed spin-based device can be utilized for non-magnetic control of spin flow by tuning the ac gate voltage and the driving frequency.
6 pages, 3 figures
References in corpus (22)
- Spintronics: Fundamentals and applications
- Coupled quantum dots as quantum gates
- Scattering approach to parametric pumping
- An Adiabatic Quantum Electron Pump
- Spin battery operated by ferromagnetic resonance
- Spin interference effects in ring conductors subject to Rashba coupling
- Experimental Realization of a Quantum Spin Pump
- An Adiabatic Quantum Pump of Spin Polarized Current
- Rashba and Dresselhaus Spin-Splittings in Semiconductor Quantum Wells Measured by Spin Photocurrents
- Charge Pumping and Photovoltaic effect in Open Quantum Dots
- A spin-cell for spin current
- Pumping spin with electrical fields
- Parametric pumping at finite frequency
- Mesoscopic effects in adiabatic spin pumping
- Quantum spin pumping with adiabatically modulated magnetic barrier's
- Quantum splitter controlled by Rashba spin-orbit interaction
- Spin filtering by a periodic nanospintronic devices
- Spin filtering due to quantum interference in periodic mesoscopic networks
- Nonadiabatic quantum pumping in mesoscopic nanostructures
- Current noise in a irradiated point contact
- DC Spin Current Generation in a Rashba-type Quantum Channel
- Pauli blocking factors in quantum pumps
Cited by in corpus (7)
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- Effect of gate-driven spin resonance on the conductance of a one-dimensional quantum wire
- All-Electrical Generation of Spin-Polarized Currents in Quantum Spin Hall Insulators
- Gate-control of spin-motive force and spin-torque in Rashba SOC systems
- Terahertz spin ratchet effect in magnetic metamaterials
- Nonlinear spin Hall effect in GaAs (110) quantum wells
- Dynamical Spin-Orbit-Based Spin Transistor