论文标题
纳米座中表面自旋诱导的电子自旋松弛的减少
Reduction of surface spin-induced electron spin relaxations in nanodiamonds
论文作者
论文摘要
纳米座（NDS）托管氮 - 呈（NV）中心有望用于量子传感的应用。长旋转放松时间（$ T_1 $和$ T_2 $）对于量子应用中的高灵敏度至关重要。已经表明，由于表面旋转引起的磁场的波动强烈影响$ t_1 $和$ t_2 $的NDS。但是，他们的放松机制尚未完全理解。在本文中，我们调查了NDS中的单物体氮杂质（P1）中心的表面旋转与$ t_1 $和$ t_2 $的关系。通常位于NV中心附近的P1中心是研究NV中心的自旋松弛过程的绝佳模型系统。通过采用高频电子顺磁共振（EPR）光谱，我们验证空气退火可以有效地去除表面旋转，并将其贡献显着降低至$ t_1 $。
Nanodiamonds (NDs) hosting nitrogen-vacancy (NV) centers are promising for applications of quantum sensing. Long spin relaxation times ($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 $T_1$.
