Coherent NMR Stark spectroscopy
- Resource Type
- Authors
- David J. Goldfarb; James G. Kempf; Matthew R. Tarasek
- Source
- Journal of Magnetic Resonance. 214:346-351
- Subject
- Models, Molecular
Nuclear and High Energy Physics
Magnetic Resonance Spectroscopy
Chemistry
Biophysics
Condensed Matter Physics
Electrostatics
Biochemistry
Spectral line
symbols.namesake
Models, Chemical
Stark effect
Electric field
Bulk samples
Quantum mechanics
Quadrupole
symbols
Computer Simulation
Stark spectroscopy
Atomic physics
Hamiltonian (control theory)
- Language
- ISSN
- 1090-7807
We demonstrate phase-coherent Stark effects from a radiofrequency E field at twice the NMR frequency (2ω0) of 69Ga in GaAs. The 2ω0 phase (ϕE) selects component responses from the nuclear quadrupole Hamiltonian ( H Q ) . This is possible by synchronizing few-μs 2ω0 pulses with an NMR line-narrowing sequence, which averages the Stark interaction to dominate spectra on a background with 103× enhanced resolution. Spectra vs ϕE reveal relative sizes of tensorial factors in H Q . Comparative modeling and numerical simulations evaluate spectral features unexplained by average Hamiltonian theory, and suggest improvements for quantitative calibration of individual response components. Application of this approach to bulk samples is of value to define Stark responses that may later be used to interrogate the internal electrostatics of structured samples.