Weak antilocalization in high mobility Ga(x)In(1-x)As/InP two-dimensional electron gases with strong spin-orbit coupling

Abstract

We have studied the spin-orbit interaction in a high mobility two-dimensional electron gas in a GaInAs/InP heterostructure as a function of an applied gate voltage as well as a function of temperature. Highly sensitive magnetotransport measurements of weak antilocalization as well as measurements of Shubnikov--de Haas oscillations were performed in a wide range of electron sheet concentrations. In our samples the electron transport takes place in the strong spin precession regime in the whole range of applied gate voltages, which is characterized by the spin precession length being shorter than the elastic mean free path. The magnitude of the Rashba spin-orbit coupling parameter was determined by fitting the experimental curves by a simulated quantum conductance correction according to a model proposed recently by Golub [Phys. Rev. B 71, 235310 (2005)]. A comparison of the Rashba coupling parameter extracted using this model with the values estimated from the analysis of the beating pattern in the Shubnikov--de Haas oscillations showed a good agreement.

5 pages, 5 figures, accepted for publication in Phys.Rev.B

References in corpus (9)

• Non-ballistic spin field-effect transistor
• Gate-Controlled Spin-Orbit Quantum Interference Effects in Lateral Transport
• Weak Antilocalization and Spin Precession in Quantum Wells
• Coulomb scattering lifetime of a two-dimensional electron gas
• Conduction band spin splitting and negative magnetoresistance in ${\mathrm{A}}_3{\mathrm{B}}_5$ heterostructures
• Mesoscopic Stern-Gerlach spin filter by nonuniform spin-orbit interaction
• Weak antilocalization in high-mobility two-dimensional systems
• Zero-field spin splitting in InAs-AlSb quantum wells revisited
• Hall-like effect induced by spin-orbit interaction

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• Alternative method for the quantitative determination of Rashba- and Dresselhaus spin-orbit interaction using the magnetization
• Rashba spin orbit interaction in a quantum wire superlattice
• Interference-induced magnetoresistance in HgTe quantum wells
• Interaction-induced crossover between weak anti-localization and weak localization in a disordered InAs/GaSb double quantum well
• Weak localization in low-symmetry quantum wells
• Interaction correction to the conductivity of two-dimensional electron gas in In${}_x$Ga${}_{1-x}$As/InP quantum well structure with strong spin-orbit coupling
• Dresselhaus spin-orbit interaction in the p-AlGaAs/GaAs/AlGaAs structure with a square quantum well: Surface Acoustic Waves Study
• Reliable modeling of weak antilocalization for accurate spin-lifetime extraction