Interplay between quantum dissipation and an in-plane magnetic field in the spin ratchet effect
arXiv:0809.1296 · doi:10.1103/PhysRevB.78.245323
Abstract
We investigate the existence of the pure spin ratchet effect in a dissipative quasi-one-dimensional system with Rashba spin-orbit interaction. The system is additionally placed into a transverse uniform stationary in-plane magnetic field. It is shown that the effect exists at low temperatures and pure spin currents can be generated by applying an unbiased ac driving to the system. An analytical expression for the ratchet spin current is derived. From this expression it follows that the spin ratchet effect appears as a result of the simultaneous presence of the spin-orbit interaction, coupling between the orbital degrees of freedom and spatial asymmetry. In this paper we consider the case of a broken spatial symmetry by virtue of asymmetric periodic potentials. It turns out that an external magnetic field does not have any impact on the existence of the spin ratchet effect, but it influences its efficiency enhancing or reducing the magnitude of the spin current.
16 pages, 5 figures; difference between the two spin current definitions is explained in Appendix B; physical explanation of the orbit-orbit coupling is given; spin pumps are mentioned
References in corpus (24)
- Universal Intrinsic Spin-Hall Effect
- Dissipationless Quantum Spin Current at Room Temperature
- Direct electronic measurement of the spin Hall effect
- Experimental observation of the spin-Hall effect in a two dimensional spin-orbit coupled semiconductor system
- Spatial imaging of the spin Hall effect and current-induced polarization in two-dimensional electron gases
- Current induced electron spin polarization in strained semiconductors
- On A Proper Definition of Spin Current
- Experimental Realization of a Quantum Spin Pump
- Molecular Wires Acting as Coherent Quantum Ratchets
- Manifestation of the spin-Hall effect through transport measurements in the mesoscopic regime
- Quantum pump for spin and charge transport in a Luttinger liquid
- Pure spin current from one-photon absorption of linearly polarized light in noncentrosymmetric semiconductors
- Charge Hall effect driven by spin-dependent chemical potential gradients and Onsager relations in mesoscopic systems
- Quantum spin pumping with adiabatically modulated magnetic barrier's
- Rashba quantum wire: exact solution and ballistic transport
- Theory of conserved spin current and its application to two dimensional hole gas
- Multi-band quantum ratchets
- Deduction of Pure Spin Current from Spin Linear and Circular Photogalvanic Effect in Semiconductor Quantum Wells
- Quantum dissipative Rashba spin ratchets
- Coherent spin ratchets: A spin-orbit based quantum ratchet mechanism for spin-polarized currents in ballistic conductors
- Zeeman ratchets: pure spin current generation in mesoscopic conductors with non-uniform magnetic fields
- Transverse electric current induced by optically injected spin current in cross-shaped InGaAs/InAlAs system
- Bloch's theory in periodic structures with Rashba's spin-orbit interaction
- Duality Relation for Quantum Ratchets
Cited by in corpus (7)
- Quantum transport in Rashba spin-orbit materials: A review
- Bloch oscillations of spin-orbit-coupled cold atoms in an optical lattice and spin current generation
- Nonlinear Floquet dynamics of spinor condensates in an optical cavity: Cavity-amplified parametric resonance
- Charge ratchet from spin flip: space-time symmetry paradox
- Spin-Orbit Based Coherent Spin Ratchets
- Resonant tunneling-based spin ratchets
- Quantum ratchet with Lindblad rate equations