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Magnetic field noise analyses generated by the interactions between a nitrogen vacancy center diamond and surface and bulk impurities
Physica B: Condensed Matter ( IF 2.8 ) Pub Date : 2021-01-09 , DOI: 10.1016/j.physb.2020.412767
Philip Chrostoski , Bruce Barrios , D.H. Santamore

We investigated the mechanism of magnetic noise due to both surface and bulk impurities. For surface noise, we apply the Langevin method to spin fluctuation theory to calculate the noise for paramagnetic surface impurities absorbed in a thin layer of water. We find that the mechanisms generating noise are spin flip and spin precession which depend on impurity spin relaxation and spin precession time. For the bulk noise, we consider carbon-13 and nitrogen as impurities and employ the correlated-cluster expansion to calculate noise. Carbon-13 noise is a few orders of magnitude larger than nitrogen due to the higher impurity density in the typical NV center diamond system. We also find that the noise in the secular approximation underestimates noise under low applied magnetic field. Overall, the major source of magnetic field noise is spin precession noise, which is more than five orders of magnitude larger than the spin flip noise.



中文翻译:

氮空位中心金刚石与表面杂质和大块杂质之间的相互作用产生的磁场噪声分析

我们研究了由于表面和整体杂质而引起的磁噪声的机理。对于表面噪声,我们将Langevin方法应用于自旋涨落理论,以计算吸收在薄水层中的顺磁性表面杂质的噪声。我们发现产生噪声的机制是自旋翻转和自旋进动,这取决于杂质自旋弛豫和自旋进动时间。对于整体噪声,我们将碳13和氮视为杂质,并采用相关聚类展开来计算噪声。由于典型的NV中心金刚石系统中较高的杂质密度,碳13噪声比氮要大几个数量级。我们还发现,长期近似中的噪声低估了低施加磁场下的噪声。总体,

更新日期:2021-01-10
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