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| Main Authors: | , , , |
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| Format: | Preprint |
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2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2409.19489 |
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| _version_ | 1866913522528550912 |
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| author | Kavtanyuk, Vladimir V. Lee, Changjae Jeong, Keunhong Shim, Jeong Hyun |
| author_facet | Kavtanyuk, Vladimir V. Lee, Changjae Jeong, Keunhong Shim, Jeong Hyun |
| contents | Optically polarizable nitrogen-vacancy (NV) center in diamond enables the hyperpolarization of $^{13}$C nuclear spins at low magnetic field and room temperature. However, achieving a high level of polarization comparable to conventional dynamic nuclear polarization has remained challenging. Here we demonstrate that, at below 10 mT, a $^{13}$C polarization of 5 % can be obtained, equivalent to an enhancement ratio over $7 \times 10^6$. We used high-purity diamond with a low initial nitrogen concentration ($<$ 1 ppm), which also results in a long storage time exceeding 100 minutes. By aligning the magnetic field along [100], the number of NV spins participating in polarization transfer increases fourfold. We conducted a comprehensive optimization of field intensity and microwave (MW) frequency-sweep parameters for this field orientation. The optimum MW sweep width suggests that polarization transfer occurs primarily to bulk $^{13}$C spins through the integrated solid effect followed by nuclear spin diffusion. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_19489 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Achieving 5 % $^{13}$C nuclear spin hyperpolarization in high-purity diamond at room temperature and low field Kavtanyuk, Vladimir V. Lee, Changjae Jeong, Keunhong Shim, Jeong Hyun Quantum Physics Atomic Physics Optically polarizable nitrogen-vacancy (NV) center in diamond enables the hyperpolarization of $^{13}$C nuclear spins at low magnetic field and room temperature. However, achieving a high level of polarization comparable to conventional dynamic nuclear polarization has remained challenging. Here we demonstrate that, at below 10 mT, a $^{13}$C polarization of 5 % can be obtained, equivalent to an enhancement ratio over $7 \times 10^6$. We used high-purity diamond with a low initial nitrogen concentration ($<$ 1 ppm), which also results in a long storage time exceeding 100 minutes. By aligning the magnetic field along [100], the number of NV spins participating in polarization transfer increases fourfold. We conducted a comprehensive optimization of field intensity and microwave (MW) frequency-sweep parameters for this field orientation. The optimum MW sweep width suggests that polarization transfer occurs primarily to bulk $^{13}$C spins through the integrated solid effect followed by nuclear spin diffusion. |
| title | Achieving 5 % $^{13}$C nuclear spin hyperpolarization in high-purity diamond at room temperature and low field |
| topic | Quantum Physics Atomic Physics |
| url | https://arxiv.org/abs/2409.19489 |