Electric field induced nuclear spin resonance

Since oscillating electric field can be generated by exciting a gate, it has an advantage of spatial selectivity. For electronic systems, the advantage is used to address single spin: single electron spin resonance has been demonstrated using oscillating electric field coupled to the spin via the spin-orbit interaction or slanting magnetic field.
We demonstrate nuclear spin resonance induced by RF electric field (nuclear electric resonance: NER). The NER is based on the electronic control of electron spins forming a domain structure in the nu=2/3 fractional quantum Hall system. The RF electric field applied to a gate excites spatial oscillations of the domain walls and thus temporal oscillations of the hyperfine field to nuclear spins. The spatial selectivity of NER would allow local probing of electronic properties or nuclear resonance imaging with nanoscale resolution.
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(Right panel) Schematic of the experimental setup. RF electric field for NER is applied to the gate through a bias-tee. To perform NMR as a reference, a wire loop for generating RF magnetic field is placed around the sample. (Left panel) (top) NER and (bottom) NMR spectra for the nu=2/3 system and at depletion. At depletion, NER does not occur due to absence of electrons. At nu=2/3, NMR shows two peaks reflecting the doamin structure of electron spins. In contrast, there is only one peak in the NER spectrum, modified by the oscillations of the domain walls.