Coherent dynamics of multi-spin V $${}_{{{{{{{{\rm{B}}}}}}}}}^{-}$$ B − center in hexagonal boron nitride

Wei Liu, Viktor Ivády, Zhi-Peng Li, Yuan-Ze Yang, Shang Yu, Yu Meng, Zhao-An Wang, Nai-Jie Guo, Fei-Fei Yan, Qiang Li, Jun-Feng Wang, Jin-Shi Xu, Xiao Liu, Zong-Quan Zhou, Yang Dong, Xiang-Dong Chen, Fang-Wen Sun, Yi-Tao Wang (), Jian-Shun Tang (), Adam Gali (), Chuan-Feng Li () and Guang-Can Guo
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Wei Liu: University of Science and Technology of China
Viktor Ivády: Max-Planck-Institut für Physik komplexer Systeme
Zhi-Peng Li: University of Science and Technology of China
Yuan-Ze Yang: University of Science and Technology of China
Shang Yu: University of Science and Technology of China
Yu Meng: University of Science and Technology of China
Zhao-An Wang: University of Science and Technology of China
Nai-Jie Guo: University of Science and Technology of China
Fei-Fei Yan: University of Science and Technology of China
Qiang Li: University of Science and Technology of China
Jun-Feng Wang: University of Science and Technology of China
Jin-Shi Xu: University of Science and Technology of China
Xiao Liu: University of Science and Technology of China
Zong-Quan Zhou: University of Science and Technology of China
Yang Dong: University of Science and Technology of China
Xiang-Dong Chen: University of Science and Technology of China
Fang-Wen Sun: University of Science and Technology of China
Yi-Tao Wang: University of Science and Technology of China
Jian-Shun Tang: University of Science and Technology of China
Adam Gali: Wigner Research Centre for Physics
Chuan-Feng Li: University of Science and Technology of China
Guang-Can Guo: University of Science and Technology of China

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: Abstract Hexagonal boron nitride (hBN) has recently been demonstrated to contain optically polarized and detected electron spins that can be utilized for implementing qubits and quantum sensors in nanolayered-devices. Understanding the coherent dynamics of microwave driven spins in hBN is of crucial importance for advancing these emerging new technologies. Here, we demonstrate and study the Rabi oscillation and related phenomena of a negatively charged boron vacancy (V $${}_{{{{{{{{\rm{B}}}}}}}}}^{-}$$ B − ) spin ensemble in hBN. We report on different dynamics of the V $${}_{{{{{{{{\rm{B}}}}}}}}}^{-}$$ B − spins at weak and strong magnetic fields. In the former case the defect behaves like a single electron spin system, while in the latter case it behaves like a multi-spin system exhibiting multiple-frequency dynamical oscillation as beat in the Ramsey fringes. We also carry out theoretical simulations for the spin dynamics of V $${}_{{{{{{{{\rm{B}}}}}}}}}^{-}$$ B − and reveal that the nuclear spins can be driven via the strong electron nuclear coupling existing in V $${}_{{{{{{{{\rm{B}}}}}}}}}^{-}$$ B − center, which can be modulated by the magnetic field and microwave field.

Date: 2022
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DOI: 10.1038/s41467-022-33399-2

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