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 (4)

• Current induced electron spin polarization in strained semiconductors
• Measurement of Rashba and Dresselhaus spin-orbit magnetic fields
• Fast nuclear spin hyperpolarization of phosphorus in silicon
• Mapping spin-orbit splitting in strained InGaAs epilayers

Cited by in corpus (4)

• 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
• Robustness of n-GaAs Carrier Spin Properties to 5 MeV Proton Irradiation
• Phase effects due to previous pulses in time-resolved Faraday rotation measurements