Sign changes and resonance of intrinsic spin Hall effect in two-dimensional hole gas

Abstract

The intrinsic spin Hall conductance shows rich sign changes by applying a perpendicular magnetic field in a two-dimensional hole gas. Especially, a notable sign changes can be achieved by adjusting the characteristic length of the Rashba coupling and hole density at moderate magnetic fields. This sign issue may be easily realized in experiments. The oscillations of the intrinsic spin Hall conductance as a function of 1/$B$ is nothing else but Shubnikov-de Haas oscillations, and the additional beatings can be quantitatively related to the value of the spin-orbit coupling parameter. The Zeeman splitting is too small to introduce effective degeneracy between different Landau levels in a two-dimensional hole gas, and the resonant intrinsic spin Hall conductance appears in high hole density and strong magnetic field due to the transition between mostly spin-$-1/2$ holes and spin-3/2 holes is confirmed. Two likely ways to establish intrinsic spin Hall effect in experiments and a possible application are suggested.

Accepted for publication in Applied Physics Letters, an enlarged version, 5 pages, 4 figs

References in corpus (8)

• Dissipationless Quantum Spin Current at Room Temperature
• Theory of Spin Hall conductivity in n-doped GaAs
• Sign Changes of Intrinsic Spin Hall Effect in Semiconductors and Simple Metals: First-Principles Calculations
• Spin Hall effect and Berry phase in two dimensional electron gas
• Resonant Spin Hall Conductance in Two-Dimensional Electron Systems with Rashba Interaction in a Perpendicular Magnetic Field
• Spin-Hall transport of heavy holes in III-V semiconductor quantum wells
• Spin Hall Effect
• Spin Hall Conductance of the Two Dimensional Hole Gas in a Perpendicular Magnetic Field

Cited by in corpus (7)

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• Magnetotransport properties of two-dimensional fermions with $k$-cubic Rashba spin-orbit interaction
• Wave packet dynamics in various two-dimensional systems: a unified description
• Disorder effect of resonant spin Hall effect in a tilted magnetic field
• Spin magnetotransport in two-dimensional hole systems
• Resonant spin Hall and Nernst effect in a nanoribbon of a spin-orbit coupled electronic system
• Extra Current and Integer Quantum Hall Conductance in the Spin-Orbit Coupling System