Robust external spin hyperpolarization of quadrupolar nuclei enabled by strain

• URL: http://arxiv.org/abs/2404.18091v1
• Date: Sun, 28 Apr 2024 06:41:47 GMT
• Title: Robust external spin hyperpolarization of quadrupolar nuclei enabled by strain
• Authors: Lu Chen, Jiawen Jiang, Martin B. Plenio, Qiong Chen,
• Abstract summary: We show the possibility of obtaining external spin-polarization by magnetic-field sweeps across the level anticrossings around zero-field. Results pave the way for hyperpolarization of spins in nanomaterials near the diamond surface without experiencing polarization loss to intrinsic nuclear spin-1/2 species. The 11B spins in h-BN nanosheets, with their extended relaxation time and large surface area, present a promising alternative for relayed nuclear polarization to the liquid phase.
• Score: 7.997969189140034
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: In a theoretical study, we investigate the spin dynamics of interacting nitrogen-vacancy (NV) centers and quadrupolar I = 3/2 nuclear spins, specifically 11B spins in hexagonal boron nitride (h-BN) nanosheets located near the microdiamond surface. We demonstrate the possibility of obtaining external spin-polarization by magnetic-field sweeps across the level anticrossings around zero-field. To achieve this, we leverage crystal strains to establish a polarization transfer mechanism that remains robust against variations in NV orientation, crystal strain inhomogeneity, and electron-nuclear effective couplings. These results pave the way for hyperpolarization of spins in nanomaterials near the diamond surface without experiencing polarization loss to intrinsic nuclear spin-1/2 species, such as 13C and 1H nuclear spins in diamond. The 11B spins in h-BN nanosheets, with their extended relaxation time and large surface area, present a promising alternative for relayed nuclear polarization to the liquid phase and for the development of quantum simulators based on surface nuclear spins.

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