Voltage control of nuclear spin in ferromagnetic Schottky diodes
arXiv:cond-mat/0304030 · doi:10.1103/PhysRevB.68.041305
Abstract
We employ optical pump-probe spectroscopy to investigate the voltage dependence of spontaneous electron and nuclear spin polarizations in hybrid MnAs/n-GaAs and Fe/n-GaAs Schottky diodes. Through the hyperfine interaction, nuclear spin polarization that is imprinted by the ferromagnet acts on conduction electron spins as an effective magnetic field. We demonstrate tuning of this nuclear field from <0.05 to 2.4 kG by varying a small bias voltage across the MnAs device. In addition, a connection is observed between the diode turn-on and the onset of imprinted nuclear polarization, while traditional dynamic nuclear polarization exhibits relatively little voltage dependence.
arXiv commentSubmitted to Physical Review B Rapid Communications. 15 pages, 3 figures
References in corpus (6)
- Optical manipulation of nuclear spin by a two-dimensional electron gas
- Origin of enhanced dynamic nuclear polarization and all-optical nuclear magnetic resonance in GaAs quantum wells
- Spontaneous Spin Coherence in n-GaAs Produced by Ferromagnetic Proximity Polarization
- Ferromagnetic imprinting of spin polarization in a semiconductor
- Spin-dependent properties of a two-dimensional electron gas with ferromagnetic gates
- Dynamic Nuclear Overhauser Shifts in Larmor beats from a quantum well
Cited by in corpus (12)
- Hyperfine interaction in a quantum dot: Non-Markovian electron spin dynamics
- Electrical Detection of Spin Accumulation at a Ferromagnet-Semiconductor Interface
- Spin accumulation in forward-biased MnAs/GaAs Schottky diodes
- Electron Spin Dynamics and Hyperfine Interactions in Fe/Al_0.1Ga_0.9As/GaAs Spin Injection Heterostructures
- Dynamic ferromagnetic proximity effect in photoexcited semiconductors
- Dynamic nuclear polarization from current-induced electron spin polarization
- Optical Orientation in Ferromagnet/Semiconductor Hybrids
- Nuclear Magnetic Resonance in a Ferromagnet-Semiconductor Heterostructure
- Theory of Spin Transport Induced by Ferromagnetic Proximity On a Two-Dimensional Electron Gas
- Optically-patterned nuclear doughnuts in GaAs/MnAs heterostructures
- The Silicon Inversion Layer With A Ferromagnetic Gate: A Novel Spin Source
- Dynamical polarization of nuclear spins by acceptor-bound holes in a zinc blende semiconductor