Spin orientation by electric current in (110) quantum wells

Abstract

We develop a theory of spin orientation by electric current in (110)-grown semiconductor quantum wells. The controversy in the factor of two from two existed approaches is resolved by pointing out the importance of energy relaxation in this problem. The limiting cases of fast and slow energy relaxation relative to spin relaxation are considered for asymmetric (110) quantum wells. For symmetricly-doped structures the effect of spin orientation is shown to exist due to spatial fluctuations of the Rashba spin-orbit splitting. We demonstrate that the spin orientation depends strongly on the correlation length of these fluctuations as well as on the ratio of the energy and spin relaxation rates. The time-resolved kinetics of spin polarization by electric current is also governed by the correlation length being not purely exponential at slow energy relaxation. Electrical spin orientation in two-dimensional topological insulators is calculated and compared with the spin polarization induced by the magnetic field.

8 pages, 2 figures

References in corpus (6)

• Current induced electron spin polarization in strained semiconductors
• Anisotropic current-induced spin accumulation in the two-dimensional electron gas with spin-orbit coupling
• Tuning the Spin Hall Effect in a Two-Dimensional Electron Gas
• Spin relaxation and combined resonance in two-dimensional electron systems with spin-orbit disorder
• Frequency dependence of induced spin polarization and spin current in quantum wells
• Electron g-Factor Anisotropy in Symmetric (110)-oriented GaAs Quantum Wells

Cited by in corpus (19)

• Theory of current-induced spin polarizations in an electron gas
• Current-induced spin polarization in graphene due to Rashba spin-orbit interaction
• Current-induced spin polarization and spin-orbit torque in graphene
• Electromagnetic spin polarization on the surface of topological insulator
• Spin fluctuations of non-equilibrium electrons and excitons in semiconductors
• Current-induced spin polarization of a magnetized two-dimensional electron gas with Rashba spin-orbit interaction
• Room temperature spin thermoelectrics in metallic films
• Thermally-induced spin polarization in a magnetized two-dimensional electron gas with Rashba spin-orbit interaction
• Spin-dependent phenomena in semiconductors in strong electric fields
• Nonlocal magnetolectric effects in diffusive conductors with spatially inhomogeneous spin-orbit coupling
• Weak localization in low-symmetry quantum wells
• Charge and spin conductivity of a two-dimensional electron gas with random Rashba interaction
• The influence of anisotropic Rashba spin-orbit coupling on current-induced spin polarization in graphene
• Current-induced spin orientation in semiconductors and low-dimensional structures
• Spin dynamics and fluctuations in the streaming regime
• Inverse spin galvanic effect in proximitized superconductor/paramagnet systems
• Edge spin galvanic effect in altermagnets
• Hanle effect in current induced spin orientation
• Perspectives on Magnetic/Superconductor Hybrid Systems: Long-range Electromagnetic Phenomena Induced by Proximity Effect and Interfacial Spin-orbit Coupling