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arXiv 1407.0468cond-mat.mes-hallphysics.chem-phquant-ph
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金刚石中负电荷氮空位中心磁谱中的零场线

Zero field line in the magnetic spectra of negatively charged nitrogen-vacancy centers in diamond

S. V. Anishchik, V. G. Vins, A. P. Yelisseyev, N. N. Lukzen, N. L. Lavrik, V. A. Bagryansky

摘要:

研究了带负电荷的氮空位中心(NV-)金刚石的发光与外加磁场(磁谱)的关系。在零磁场中发现了一条窄线。这条谱线的性质与其他窄磁谱线的性质有很大的不同。它的大小是弱依赖于单晶样品的外部磁场的取向。在粉末样品中也观察到这条线。当激发光偏振态变化时,谱线的形状发生很大变化。线的大小与激发光强度具有非线性关系。对于低强度,这种依赖性接近平方律。为了解释在磁谱中产生这条线的机制,我们提出了一个基于不同NV-中心之间的偶极-偶极相互作用的模型。

英文摘要:

The dependence of the luminescence of diamonds with negatively charged nitrogen-vacancy centers (NV-) vs. applied magnetic field (magnetic spectrum) was studied. A narrow line in zero magnetic field was discovered. The properties of this line are considerably different from those of other narrow magnetic spectrum lines. Its magnitude is weakly dependent of the orientation of the single-crystal sample to the external magnetic field. This line is also observed in a powdered sample. The shape of the line changes greatly when excitation light polarization is varied. The magnitude of the line has a non-linear relation to excitation light intensity. For low intensities this dependence is close to a square law. To explain the mechanism giving rise to this line in the magnetic spectrum, we suggest a model based on the dipole-dipole interaction between different NV- centers.

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