Cubic Dresselhaus Spin-Orbit Coupling in 2D Electron Quantum Dots

Abstract

We study effects of the oft-neglected cubic Dresselhaus spin-orbit coupling (i.e., $\propto p^3$) in GaAs/AlGaAs quantum dots. Using a semiclassical billiard model, we estimate the magnitude of the spin-orbit induced avoided crossings in a closed quantum dot in a Zeeman field. Using these results, together with previous analyses based on random matrix theory, we calculate corresponding effects on the conductance through an open quantum dot. Combining our results with an experiment on conductance through an 8 um^2 quantum dot [D M Zumbuhl et al., Phys. Rev. B 72, 081305 (2005)] suggests that 1) the GaAs Dresselhaus coupling constant, $\gamma$, is approximately 9 eVA^3, significantly less than the commonly cited value of 27.5 eVA^3 and 2) the majority of the spin-flip component of spin-orbit coupling can come from the cubic Dresselhaus term.

4 pages plus supplementary table

References in corpus (13)

• Non-ballistic spin field-effect transistor
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• Weak Antilocalization and Spin Precession in Quantum Wells
• Spin-orbit coupling effects on quantum transport in lateral semiconductor dots
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• Semiclassical Time Evolution and Trace Formula for Relativistic Spin-1/2 Particles
• Spin orbit effects in a GaAs quantum dot in a parallel magnetic field
• The role of orbital dynamics in spin relaxation and weak antilocalization in quantum dots
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• Weak localization and conductance fluctuations in a quantum dot with parallel magnetic field and spin-orbit scattering
• Conductance Fluctuations and Spin Symmetries in Quantum Dots

Cited by in corpus (31)

• Semiconductor Spintronics
• Emergence of the persistent spin helix in semiconductor quantum wells
• Spin dynamics in semiconductors
• Questaal: a package of electronic structure methods based on the linear muffin-tin orbital technique
• Electron spin relaxation in bulk III-V semiconductors from a fully microscopic kinetic spin Bloch equation approach
• Intersubband-induced spin-orbit interaction in quantum wells
• Gate-controlled spin-orbit interaction in a parabolic GaAs/AlGaAs quantum well
• Cubic spin-orbit coupling and anomalous Josephson effect in planar junctions
• Stretchable persistent spin helices in GaAs quantum wells
• First-principles studies of orbital and spin-orbit properties of GaAs, GaSb, InAs, and InSb zinc-blende and wurtzite semiconductors
• Role of linear and cubic terms for the drift-induced Dresselhaus spin-orbit splitting in a two-dimensional electron gas
• Prediction of large linear-in-k spin splitting for holes in the 2D GaAs/AlAs system
• Critical supercurrent and ${\varphi }_0$ state for probing a persistent spin helix
• Spin relaxation near the metal-insulator transition: dominance of the Dresselhaus spin-orbit coupling
• Spin-orbit coupling in bulk GaAs
• Symmetry Breaking of the Persistent Spin Helix in Quantum Transport
• Spin-polarized electric currents in quantum transport through tubular two-dimensional electron gases
• Interface Contributions to the Spin-Orbit Interaction Parameters of Electrons at the (001) GaAs/AlGaAs Interface
• Spin relaxation due to random Rashba spin-orbit coupling in GaAs (110) quantum wells
• Quantum Hall ferromagnetic states and spin-orbit interactions in the fractional regime
• Strain-Induced Conduction Band Spin Splitting in GaAs from First Principles Calculations
• Relaxation of Electron Spin during High-Field Transport in GaAs Bulk
• Parametric spin excitations in lateral quantum dots
• Numerical study of resonant spin relaxation in quasi-1D channels
• Quantitative modeling of spin relaxation in quantum dots
• Charge and spin diffusion on the metallic side of the metal-insulator transition: a self-consistent approach
• Anomalous magnetic suppression of spin relaxation in a two-dimensional electron gas in a GaAs/AlGaAs quantum well
• Low-symmetry nanowire cross-sections for enhanced Dresselhaus spin-orbit interaction
• Suppression of Hyperfine Dephasing by Spatial Exchange of Double Quantum Dots
• Spin-orbit coupled transport in a curved quantum wire
• Confinement sensitivity in quantum dot singlet-triplet relaxation