The integration of NMR and high pressure technique brings unique opportunities to study electronic, structural and dynamical properties under extreme conditions. Despite a great degree of success has been achieved using coil-based schemes, the contradictory requirement on sample volume of these two techniques remains an outstanding challenge. In this letter, we introduce diamond nitrogen-vacancy (NV) centers, as the source and probe of in-situ nuclear spin polarization, to address the sample volume issue. We demonstrate hyperpolarization and coherent control of 14N nuclear spins under high pressures. NMR spectra of a micro-diamond are measured up to 16.6 GPa, and unexpected pressure shift of the 14N nuclear quadrupole and hyperfine coupling terms are observed. Our work contributes to quantum sensing enhanced spectrometry under extreme conditions.
@article{arxiv.2203.10511,
title = {High-Pressure NMR Enabled by Diamond Nitrogen-Vacancy Centers},
author = {Yan-Xing Shang and Fang Hong and Jian-Hong Dai and Ya-Nan Lu and Hui Yu and Yong-Hong Yu and Xiao-Hui Yu and Xin-Yu Pan and Gang-Qin Liu},
journal= {arXiv preprint arXiv:2203.10511},
year = {2022}
}