Current-induced Spin Polarization in Two-Dimensional Hole Gas

Abstract

We investigate the current-induced spin polarization in the two-dimensional hole gas (2DHG) with the structure inversion asymmetry. By using the perturbation theory, we re-derive the effective $k$-cubic Rashba Hamiltonian for 2DHG and the generalized spin operators accordingly. Then based on the linear response theory we calculate the current-induced spin polarization both analytically and numerically with the disorder effect considered. We have found that, quite different from the two-dimensional electron gas, the spin polarization in 2DHG depends linearly on Fermi energy in the low doping regime, and with increasing Fermi energy, the spin polarization may be suppressed and even changes its sign. We predict a pronounced peak of the spin polarization in 2DHG once the Fermi level is somewhere between minimum points of two spin-split branches of the lowest light-hole subband. We discuss the possibility of measurements in experiments as regards the temperature and the width of quantum wells.

13 pages, 8 figures, submitted to PRB

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Cited by in corpus (12)

• Influence of a Transport Current on Magnetic Anisotropy in Gyrotropic Ferromagnets
• Generating a topological anomalous Hall effect in a non-magnetic conductor
• Strong influence of spin-orbit coupling on magnetotransport in two-dimensional hole systems
• Spin polarizations and spin Hall currents in a two-dimensional electron gas with magnetic impurities
• Emergence of the strong tunable linear Rashba spin-orbit coupling of two-dimensional hole gases in semiconductor quantum
• Hole Spin Helix: Anomalous Spin Diffusion in Anisotropic Strained Hole Quantum Wells
• Current-induced spin polarization for a general two-dimensional electron system
• Current-induced spin polarization in isotropic k-cubed Rashba model: Theoretical study for p-doped semiconductor heterostructures and perovskite oxides interfaces
• Current-induced spin polarisation in Rashba-Dresselhaus systems under different point groups
• Anomalous Hall and Nernst effects in a two-dimensional electron gas with an anisotropic cubic Rashba spin-orbit interaction
• Ge as an orbitronic platform: giant in-plane orbital magneto-electric effect in a 2-dimensional hole gas
• Bilinear magnetoresistance in 2DEG with isotropic cubic Rashba spin-orbit interaction