Mapping spin-orbit splitting in strained InGaAs epilayers

Abstract

Time- and spatially-resolved Faraday rotation spectroscopy is used to measure the magnitude and direction of the momentum-dependent spin splitting in strained InGaAs epilayers. The epilayers are lattice-matched to the GaAs substrate and designed to reduce inhomogeneous effects related to strain relaxation. Measurements of momentum-dependent spin splitting as a function of electron spin drift velocity along [100], [010], [110] and [1$\overline{1}$0] directions enable separation of isotropic and anisotropic effective magnetic fields that arise from uniaxial and biaxial strain along $⟨$110$⟩$. We relate our findings to previous measurements and theoretical predictions of spin splitting for inversion symmetry breaking in bulk strained semiconductors.

5 pages, 4 figures

References in corpus (6)

• Measurement of Rashba and Dresselhaus spin-orbit magnetic fields
• Imaging spin flows in semiconductors subject to electric, magnetic, and strain fields
• Spin Splitting and Spin Current in Strained Bulk Semiconductors
• Effects of strain, electric, and magnetic fields on lateral electron spin transport in semiconductor epilayers
• Spin lifetimes and strain-controlled spin precession of drifting electrons in zinc blende type semiconductors
• Mechanical control of spin-orbit splitting in GaAs and InGaAs epilayers

Cited by in corpus (13)

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• Electron Spin Resonance in a Two-Dimensional Fermi Liquid with Spin-Orbit Coupling
• Dynamic nuclear polarization from current-induced electron spin polarization
• Large spin-Hall effect in Si at room temperature
• All-electrical time-resolved spin generation and spin manipulation in n-InGaAs
• Gate control of the spin mobility through the modification of the spin-orbit interaction in two-dimensional systems
• Unambiguous determination of spin dephasing times in ZnO
• g-Factor Modification in a Bulk InGaAs Epilayer by an In-plane Electric Field
• Current-induced spin polarization in InGaAs and GaAs epilayers with varying doping densities
• Phase effects due to previous pulses in time-resolved Faraday rotation measurements
• Theory of invariants-based formulation of $\mathbf{k}\cdot \mathbf{p}$ Hamiltonians with application to strained zinc-blende crystals
• Curvature-induced valley-dependent spin-orbit interaction