Out-of-plane equilibrium spin current in a quasi-two-dimensional electron gas under in-plane magnetic field

Abstract

Equilibrium spin-current is calculated in a quasi-two-dimensional electron gas with finite thickness under in-plane magnetic field and in the presence of Rashba- and Dresselhaus spin-orbit interactions. The transverse confinement is modeled by means of a parabolic potential. An orbital effect of the in-plane magnetic field is shown to mix a transverse quantized spin-up state with nearest-neighboring spin-down states. The out-off-plane component of the equilibrium spin current appears to be not zero in the presence of an in-plane magnetic field, provided at least two transverse-quantized levels are filled. In the absence of the magnetic field the obtained results coincide with the well-known results, yielding cubic dependence of the equilibrium spin current on the spin-orbit coupling constants. The persistent spin-current vanishes in the absence of the magnetic field if Rashba- and Dresselhaus spin-orbit coefficients,α and β, are equal each other. In-plane magnetic field destroys this symmetry, and accumulates a finite spin-current as α \rightarrow β. Magnetic field is shown to change strongly the equilibrium current of the in-plane spin components, and gives new contributions to the cubic-dependent on spin-orbit constants terms. These new terms depend linearly on the spin-orbit constants.

15 pages

References in corpus (15)

• Universal Intrinsic Spin-Hall Effect
• Dissipationless Quantum Spin Current at Room Temperature
• Spin current and polarization in impure 2D electron systems with spin-orbit coupling
• Current induced electron spin polarization in strained semiconductors
• Orbital mechanisms of electron spin manipulation by an electric field
• Theory of Spin-Charge Coupled Transport in a Two-Dimensional Electron Gas with Rashba Spin-Orbit Interactions
• Spin currents and spin superfluidity
• Diffuse transport and spin accumulation in a Rashba two-dimensional electron gas
• Hyperfine-mediated gate-driven electron spin resonance
• Dissipation effects in spin-Hall transport of electrons and holes
• Out-of-plane spin polarization from in-plane electric and magnetic fields
• Spin susceptibilities, spin densities and their connection to spin-currents
• Equilibrium spin currents in the Rashba medium
• Mechanical measurement of equilibrium spin currents in the Rashba medium
• Theory of Electric Dipole Spin Resonance in a Parabolic Quantum Well

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