Knight shift detection using gate-induced decoupling of the hyperfine interaction in quantum Hall edge channels
arXiv:cond-mat/0607028 · doi:10.1063/1.2335595
Abstract
A method for the observation of the Knight shift in nanometer-scale region in semiconductors is developed using resistively detected nuclear magnetic resonance (RDNMR) technique in quantum Hall edge channels. Using a gate-induced decoupling of the hyperfine interaction between electron and nuclear spins, we obtain the RDNMR spectra with or without the electron-nuclear spin coupling. By a comparison of these two spectra, the values of the Knight shift can be given for the nuclear spins polarized dynamically in the region between the relevant edge channels in a single two-dimensional electron system, indicating that this method has a very high sensitivity compared to a conventional NMR technique.
arXiv comment4 pages, 4 figures, to appear in Applied Physics Letters
References in corpus (2)
Cited by in corpus (10)
- Shot Noise in Mesoscopic Systems: from Single Particles to Quantum Liquids
- Decoherence of nuclear spins due to direct dipole-dipole interactions probed by resistively detected nuclear magnetic resonance
- Electrical coherent control of nuclear spins in a breakdown regime of quantum Hall effect
- Shot Noise Induced by Electron-nuclear Spin-flip Scattering in a Nonequilibrium Quantum Wire
- Strain-induced enhancement of electric quadrupole splitting in resistively detected nuclear magnetic resonance spectrum in quantum Hall systems
- Dispersive line shape in the vicinity of the ν = 1 quantum Hall state: Coexistence of Knight shifted and unshifted resistively detected NMR responses
- Resistively-detected NMR lineshapes in a quasi-one dimensional electron system
- Two-step breakdown of a local v = 1 quantum Hall state
- Dynamic nuclear polarization and Knight shift measurements in a breakdown regime of integer quantum Hall effect
- Gate-controlled nuclear magnetic resonance in an AlGaAs/GaAs quantum Hall device