Demonstration of NV-detected C13 NMR at 4.2 T
Demonstration of NV-detected C13 NMR at 4.2 T
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DOI：
10.1103/physrevb.108.045421
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发表时间：
2023-03
影响因子：
3.7
通讯作者：
Yuhang Ren;Cooper Selco;Dylan Kawashiri;Michael Coumans;Benjamin Fortman;L. Bouchard;K. Holczer;Susumu Takahashi
中科院分区：
文献类型：
--
作者：
Yuhang Ren;Cooper Selco;Dylan Kawashiri;Michael Coumans;Benjamin Fortman;L. Bouchard;K. Holczer;Susumu Takahashi
金刚石中的氮空位（NV）中心使得纳米级核磁共振（NMR）和电子顺磁共振（ESR）的研究在小样品体积下具有高灵敏度。大多数NV检测的NMR（NV-NMR）实验在低磁场下进行。虽然低场在许多应用中是有用的，但具有精细光谱分辨率、高信号灵敏度和观察更广泛核的能力的高场NV-NMR对于旨在探测微米和纳米级特征的表面检测、微流体和凝聚态研究是有利的。然而，只有少数实验超过1 T的报告。本文中，我们报告了4.2 T下的$^{13}$C NV-NMR光谱，其中NV拉莫尔频率为115 GHz。利用电子-核双共振技术，我们成功地检测了两个金刚石样品的NV-NMR。根据货车Vleck的偶极展宽理论对样品1的NMR谱线宽度进行了分析，结果表明，样品1的NMR谱线宽度与样品1的本征谱线宽度一致。对于样品2，我们发现44 ppm的较窄线宽。这项工作为纳米NV-NMR的新应用铺平了道路。
The nitrogen-vacancy (NV) center in diamond has enabled studies of nanoscale nuclear magnetic resonance (NMR) and electron paramagnetic resonance with high sensitivity in small sample volumes. Most NV-detected NMR (NV-NMR) experiments are performed at low magnetic fields. While low fields are useful in many applications, high-field NV-NMR with fine spectral resolution, high signal sensitivity, and the capability to observe a wider range of nuclei is advantageous for surface detection, microfluidic, and condensed matter studies aimed at probing micro- and nanoscale features. However, only a handful of experiments above 1 T were reported. Herein, we report $^{13}$C NV-NMR spectroscopy at 4.2 T, where the NV Larmor frequency is 115 GHz. Using an electron-nuclear double resonance technique, we successfully detect NV-NMR of two diamond samples. The analysis of the NMR linewidth based on the dipolar broadening theory of Van Vleck shows that the observed linewidths from sample 1 are consistent with the intrinsic NMR linewidth of the sample. For sample 2 we find a narrower linewidth of 44 ppm. This work paves the way for new applications of nanoscale NV-NMR.