Nanoscale zero-field electron spin resonance spectroscopy

Fei Kong, Pengju Zhao, Xiangyu Ye, Zhecheng Wang, Zhuoyang Qin, Pei Yu, Jihu Su, Fazhan Shi () and Jiangfeng Du ()
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Fei Kong: University of Science and Technology of China (USTC)
Pengju Zhao: University of Science and Technology of China (USTC)
Xiangyu Ye: University of Science and Technology of China (USTC)
Zhecheng Wang: University of Science and Technology of China (USTC)
Zhuoyang Qin: University of Science and Technology of China (USTC)
Pei Yu: University of Science and Technology of China (USTC)
Jihu Su: University of Science and Technology of China (USTC)
Fazhan Shi: University of Science and Technology of China (USTC)
Jiangfeng Du: University of Science and Technology of China (USTC)

Nature Communications, 2018, vol. 9, issue 1, 1-7

Abstract: Abstract Electron spin resonance (ESR) spectroscopy has broad applications in physics, chemistry, and biology. As a complementary tool, zero-field ESR (ZF-ESR) spectroscopy has been proposed for decades and shown its own benefits for investigating the electron fine and hyperfine interaction. However, the ZF-ESR method has been rarely used due to the low sensitivity and the requirement of much larger samples than conventional ESR. In this work, we present a method for deploying ZF-ESR spectroscopy at the nanoscale by using a highly sensitive quantum sensor, the nitrogen vacancy center in diamond. We also measure the nanoscale ZF-ESR spectrum of a few P1 centers in diamond, and show that the hyperfine coupling constant can be directly extracted from the spectrum. This method opens the door to practical applications of ZF-ESR spectroscopy, such as investigation of the structure and polarity information in spin-modified organic and biological systems.

Date: 2018
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DOI: 10.1038/s41467-018-03969-4

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