Electronic structure and transport for a laser-field-irradiated quantum wire with Rashba spin-orbit coupling
arXiv:cond-mat/0606379 · doi:10.1088/0953-8984/18/40/003
Abstract
We investigate theoretically the electronic structure and transport for a two-level quantum wire with Rashba spin-orbit coupling (SOC) under the irradiation of an external laser field at low temperatures. The photon-induced transitions between SOC-splitted subbands with the same lateral confinement quantum numbers and between subbands with different confinement quantum number are expected. Using the method of equation of motion (EOM) for Keldysh nonequilibrium Green's functions (NGF), we examine the time-averaged density of states (DOS) and the spin polarized conductance for the system with photon polarization perpendicular to the wire direction. Through the analytical analysis and some numerical examples, the interplay effects of the external laser field and the Rashba SOC on both the DOS and the conductance of the system are demonstrated and discussed. It is found that the external laser field can adjust the spin polarization rate and the transport of the quantum wire system with some proper Rashba SOC strengths.
7 pages, 6 figures
References in corpus (26)
- Spintronics: Fundamentals and applications
- Spin Hall effect
- Universal Intrinsic Spin-Hall Effect
- Dissipationless Quantum Spin Current at Room Temperature
- Time-dependent transport in interacting and non-interacting mesoscopic systems
- Ballistic spin-polarized transport and Rashba spin precession in semiconductor nanowires
- SU(2) Non-Abelian Holonomy and Dissipationless Spin Current in Semiconductors
- Quantum transport theory for nanostructures with Rashba spin-orbital interaction
- Effect of the spin-orbit interaction on the band structure and conductance of quasi-one-dimensional systems
- Spin Accumulation in Quantum Wires with Strong Rashba Spin-Orbit Coupling
- Evidence of spontaneous spin polarized transport in magnetic nanowires
- Resonant Spin Hall Conductance in Two-Dimensional Electron Systems with Rashba Interaction in a Perpendicular Magnetic Field
- Spin Orientation and Spin Precession in Inversion-Asymmetric Quasi Two-Dimensional Electron Systems
- Interaction-Induced Enhancement of Spin-Orbit Coupling in Two-Dimensional Electronic System
- Spontaneous spin-polarized current in a nonuniform Rashba interaction system
- Spin transport in interacting quantum wires and carbon nanotubes
- Spin current and accumulation generated by spin Hall insulator
- Spin current injection by intersubband transitions in quantum wells
- Beating of the oscillations in the transport coefficients of a one-dimensionally periodically modulated two-dimensional electron gas in the presence of spin-orbit interaction
- Spin-photovoltaic effect in quantum wires due to inter-subband transitions
- Ballistic spin currents in mesoscopic metal/In(Ga)As/metal junctions
- Intense terahertz laser fields on a two-dimensional electron gas with Rashba spin-orbit coupling
- Spin precession due to spin-orbit coupling in a two-dimensional electron gas with spin injection via ideal quantum point contact
- Charge and spin density modulations in semiconductor quantum wires
- Role of relaxation in spin Hall effect
- Spin Photovoltaic Effect in Quantum Wires with Rashba Interaction