Electron paramagnetic resonance and photochromism of N3V0 in diamond
Electron paramagnetic resonance and photochromism of N3V0 in diamond
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DOI：
10.1088/1361-648x/aa6c89
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发表时间：
2017-02
期刊：
影响因子：
--
通讯作者：
B. Green;B. Breeze;M. Newton
中科院分区：
文献类型：
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作者：
B. Green;B. Breeze;M. Newton
金刚石中由三个最近邻的氮原子和一个碳原子包围的空位形成的缺陷N3V存在于绝大多数天然金刚石中。尽管N3V0是在金刚石中观察到的最早的电子顺磁共振谱，但由于其复杂性，迄今为止还没有对任意磁场方向的谱进行令人满意的模拟。在这项工作中，N3V0被确定在15N掺杂的合成金刚石照射和退火后。直接确定15N3V0自旋哈密顿参数，并用于改进14N3V0的参数，使后者能够准确地模拟和拟合任意磁场方向。在用绿色光激发下的15 N3V 0的研究表明N3V和Ns之间的电荷转移。有人认为，这种电荷转移是由N3V−的直接电离促进的，N3V −是一种尚未观察到的电荷状态。
The defect in diamond formed by a vacancy surrounded by three nearest-neighbor nitrogen atoms and one carbon atom, N3V, is found in the vast majority of natural diamonds. Despite N3V0 being the earliest electron paramagnetic resonance spectrum observed in diamond, to date no satisfactory simulation of the spectrum for an arbitrary magnetic field direction has been produced due to its complexity. In this work, N3V0 is identified in 15N-doped synthetic diamond following irradiation and annealing. The 15N3V0 spin Hamiltonian parameters are directly determined and used to refine the parameters for 14N3V0, enabling the latter to be accurately simulated and fitted for an arbitrary magnetic field direction. Study of 15N3V0 under excitation with green light indicates charge transfer between N3V and Ns. It is argued that this charge transfer is facilitated by direct ionization of N3V−, an as-yet unobserved charge state of N3V.