Single nuclear spin detection and control in a van der Waals material

• URL: http://arxiv.org/abs/2409.01601v1
• Date: Tue, 3 Sep 2024 04:47:35 GMT
• Title: Single nuclear spin detection and control in a van der Waals material
• Authors: Xingyu Gao, Sumukh Vaidya, Kejun Li, Saakshi Dikshit, Shimin Zhang, Peng Ju, Kunhong Shen, Yuanbin Jin, Yuan Ping, Tongcang Li,
• Abstract summary: Recently, single spin defects were discovered in hexagonal boron nitride (hBN), a layered van der Waals (vdW) material. We created single spin defects in hBN using $13$C ion implantation and identified three distinct defect types. For the first time, we demonstrated atomic-scale NMR and coherent control of individual nuclear spins in a vdW material.
• Score: 7.00960815874496
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Optically active spin defects in solids are leading candidates for quantum sensing and quantum networking. Recently, single spin defects were discovered in hexagonal boron nitride (hBN), a layered van der Waals (vdW) material. Due to its two-dimensional structure, hBN allows spin defects to be positioned closer to target samples than in three-dimensional crystals, making it ideal for atomic-scale quantum sensing, including nuclear magnetic resonance (NMR) of single molecules. However, the chemical structures of these defects remain unknown, and detecting a single nuclear spin with an hBN spin defect has been elusive. In this study, we created single spin defects in hBN using $^{13}$C ion implantation and identified three distinct defect types. We observed both $S=1$ and $S=1/2$ spin states within a single hBN spin defect, with only the $S=1/2$ states showing strong hyperfine interactions with nearby $^{13}$C nuclear spins. For the first time, we demonstrated atomic-scale NMR and coherent control of individual nuclear spins in a vdW material. By comparing experimental results with density-functional theory calculations, we propose chemical structures for these spin defects. Our work advances the understanding of single spin defects in hBN and provides a pathway to enhance quantum sensing using hBN spin defects with nuclear spins as quantum memories.

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