Electron paramagnetic resonance spectroscopy at zero magnetic field

1983 ◽  
Vol 83 (1) ◽  
pp. 49-82 ◽  
Author(s):  
Richard Bramley ◽  
Steven J. Strach
Keyword(s):  
Magnetic Field ◽  
Electron Paramagnetic Resonance ◽  
Electron Paramagnetic Resonance Spectroscopy ◽  
Zero Magnetic Field ◽  
Resonance Spectroscopy ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

scholarly journals Kilohertz electron paramagnetic resonance spectroscopy of single nitrogen centers at zero magnetic field

2020 ◽  
Vol 6 (22) ◽  
pp. eaaz8244
Author(s):  
Fei Kong ◽  
Pengju Zhao ◽  
Pei Yu ◽  
Zhuoyang Qin ◽  
Zhehua Huang ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Single Molecule ◽  
Epr Spectroscopy ◽  
Electron Paramagnetic Resonance Spectroscopy ◽  
Nitrogen Vacancy ◽  
Zero Magnetic Field ◽  
Resonance Spectroscopy ◽  
Ambient Conditions ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

Electron paramagnetic resonance (EPR) spectroscopy is among the most important analytical tools in physics, chemistry, and biology. The emergence of nitrogen-vacancy (NV) centers in diamond, serving as an atomic-sized magnetometer, has promoted this technique to single-spin level, even under ambient conditions. Despite the enormous progress in spatial resolution, the current megahertz spectral resolution is still insufficient to resolve key heterogeneous molecular information. A major challenge is the short coherence times of the sample electron spins. Here, we address this challenge by using a magnetic noise–insensitive transition between states of different symmetry. We demonstrate a 27-fold narrower spectrum of single substitutional nitrogen (P1) centers in diamond with a linewidth of several kilohertz, and then some weak couplings can be resolved. Those results show both spatial and spectral advances of NV center–based EPR and provide a route toward analytical (EPR) spectroscopy at the single-molecule level.

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