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arXiv 2008.03832cond-mat.mes-hallcond-mat.mtrl-sci
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纳米金刚石表面自旋诱导电子自旋弛豫的减少

Reduction of surface spin-induced electron spin relaxations in nanodiamonds

Zaili Peng, Jax Dallas, Susumu Takahashi

摘要:

纳米金刚石具有氮空位中心,在量子传感方面具有广阔的应用前景。长自旋弛豫时间($T_1$和$T_2$)对于量子应用中的高灵敏度是关键的。已经表明,由于表面自旋引起的磁场波动强烈影响ND中的$T_1$和$T_2$。然而,它们的松弛机制尚未完全理解。本文研究了Nd:YAG晶体中单取代氮杂质(P1)心的$T_1$和$T_2$与表面自旋的关系。位于NV心附近的P1心是研究NV心自旋弛豫过程的理想模型系统。通过采用高频电子顺磁共振(EPR)光谱,我们验证了空气退火去除表面自旋有效,并显着减少其贡献$T_1$。

英文摘要:

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 $T_1$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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