Dynamic nuclear polarization from current-induced electron spin polarization

Abstract

Current-induced electron spin polarization is shown to produce nuclear hyperpolarization through dynamic nuclear polarization. Saturated fields of several millitesla are generated upon the application of electric field over a timescale of a hundred seconds in InGaAs epilayers and measured using optical Larmor magnetometry. The dependence on temperature, external magnetic field, and applied voltage is investigated. We find an asymmetry in which the saturation nuclear field depends on the relative alignment of the electrically generated spin polarization and the external magnetic field, which we attribute to an interplay between various electron spin dynamical processes.

5 pages, 4 figures

References in corpus (10)

• Current induced electron spin polarization in strained semiconductors
• Anisotropic interactions of a single spin and dark-spin spectroscopy in diamond
• Measurement of Rashba and Dresselhaus spin-orbit magnetic fields
• Electrically-Controlled Nuclear Spin Polarization and Relaxation by Quantum-Hall states
• Optical manipulation of nuclear spin by a two-dimensional electron gas
• Fast nuclear spin hyperpolarization of phosphorus in silicon
• Mapping spin-orbit splitting in strained InGaAs epilayers
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• Nuclear Magnetic Resonance in a Ferromagnet-Semiconductor Heterostructure
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Cited by in corpus (8)

• Macroscopic transverse drift of long current-induced spin coherence in two-dimensional electron gases
• g-Factor Modification in a Bulk InGaAs Epilayer by an In-plane Electric Field
• Voltage induced conversion of helical to uniform nuclear spin polarization in a quantum wire
• Dynamic nuclear spin polarization induced by Edelstein effect at Bi(111) surfaces
• Limitation of electron mobility from hyperfine interaction in ultra-clean quantum wells and topological insulators
• Robustness of n-GaAs Carrier Spin Properties to 5 MeV Proton Irradiation
• Phase effects due to previous pulses in time-resolved Faraday rotation measurements
• Entropy Driven Inductive Response of Topological Insulators