Hole Spin Helix: Anomalous Spin Diffusion in Anisotropic Strained Hole Quantum Wells

Abstract

We obtain the spin-orbit interaction and spin-charge coupled transport equations of a two-dimensional heavy hole gas under the influence of strain and anisotropy. We show that a simple two-band Hamiltonian can be used to describe the holes. In addition to the well-known cubic hole spin-orbit interaction, anisotropy causes a Dresselhaus-like term, and strain causes a Rashba term. We discover that strain can cause a shifting symmetry of the Fermi surfaces for spin up and down holes. We predict an enhanced spin lifetime associated with a spin helix standing wave similar to the Persistent Spin Helix which exists in the two-dimensional electron gas with equal Rashba and Dresselhaus spin-orbit interactions. These results may be useful both for spin-based experimental determination of the Luttinger parameters of the valence band Hamiltonian and for creating long-lived spin excitations.

References in corpus (12)

• Dissipationless Quantum Spin Current at Room Temperature
• An Exact SU(2) Symmetry and Persistent Spin Helix in a Spin-Orbit Coupled System
• Emergence of the persistent spin helix in semiconductor quantum wells
• Spin current and polarization in impure 2D electron systems with spin-orbit coupling
• Non-diffusive spin dynamics in a two-dimensional electron gas
• Hole spin relaxation in semiconductor quantum dots
• Ballistic transport of (001) GaAs 2D holes through a strain-induced lateral superlattice
• Current-induced Spin Polarization in Two-Dimensional Hole Gas
• Hole spin relaxation in $p$-type (111) GaAs quantum wells
• Strain-induced Fermi contour anisotropy of GaAs 2D holes
• Plasmons in spin-orbit coupled two-dimensional hole gas systems
• Oscillation of spin polarization in a two-dimensional hole gas under a perpendicular magnetic field

Cited by in corpus (10)

• Persistent Spin Textures in Semiconductor Nanostructures
• Spin-orbit interactions in inversion-asymmetric 2D hole systems: a variational analysis
• Generating a topological anomalous Hall effect in a non-magnetic conductor
• Control of Spin Helix Symmetry in Semiconductor Quantum Wells by Crystal Orientation
• Emergence of the strong tunable linear Rashba spin-orbit coupling of two-dimensional hole gases in semiconductor quantum
• Persistent spin textures and currents in wurtzite nanowire-based quantum structures
• Enhanced longevity of the spin helix in low-symmetry quantum wells
• Conserved Spin Quantity in Strained Hole Systems with Rashba and Dresselhaus Spin-Orbit Coupling
• Signatures of spin-preserving symmetries in two-dimensional hole gases
• Spin Response to Localized Pumps: Exciton Polaritons Versus Electrons and Holes