Nuclear quadrupole interaction of a negatively charged boron vacancy with near and remote nitrogen nuclear magnetic moments in hexagonal boron nitride

The negatively charged boron vacancy in hexagonal boron nitride is one of the most prominent representatives of an optically active qubit in two-dimensional van der Waals materials. In this case, the electron-nuclear interactions of the vacancy with the magnetic moments of the hBN lattice atoms are of particular interest. In this paper, we investigated the nuclear quadrupole interactions of the boron vacancy with the removed nuclear spins of nitrogen $^{14}$N ($I$ = 1) using the method of electron-nuclear double resonance. A comparative analysis of the obtained parameters of the nuclear quadrupole interaction with the parameters for the nitrogen atoms closest to the vacancy is carried out. Based on the data presented, it is proposed to use the electron spin of the boron vacancy as a spin probe to study the fundamental properties of boron nitride, such as the constants of the nuclear quadrupole interaction.