Reduction of surface spin-induced electron spin relaxations in nanodiamonds
| Autor: | Peng, Zaili, Dallas, Jax, Takahashi, Susumu |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | published in Journal of Applied Physics 128, 054301 (2020) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1063/5.0007599 |
| Popis: | Nanodiamonds (NDs) hosting nitrogen-vacancy (NV) centers are promising for applications of quantum sensing. Long spin relaxation times ($T_1$ and $T_2$) are critical for high sensitivity in quantum applications. It has been shown that fluctuations of magnetic fields due to surface spins strongly influences $T_1$ and $T_2$ in NDs. However, their relaxation mechanisms have yet to be fully understood. In this paper, we investigate the relation between surface spins and $T_1$ and $T_2$ of single-substitutional nitrogen impurity (P1) centers in NDs. The P1 centers located typically in the vicinity of NV centers are a great model system to study the spin relaxation processes of the NV centers. By employing high-frequency electron paramagnetic resonance (EPR) spectroscopy, we verify that air annealing removes surface spins efficiently and significantly reduces their contribution to $T_1$. Comment: 19 pages, 4 figures |
| Databáze: | arXiv |
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