Fig. 3: Spin coupling parameters of different divacancy configurations.
From: Stabilization of point-defect spin qubits by quantum wells
a Spin density of an axial divacancy. Blue and green filled circles indicate the second neighbor silicon sites for which the hyperfine tensors were calculated. b The calculated and experimentally measured relative ground-state zero-field splitting parameter for each axial symmetric defect. D0 is equal to the ZFS of hh-4H configuration and PL1 center in the calculation of the theoretical and experimental parameters, respectively. The experimental results are reported in ref. 40. c, d Relative hyperfine parameters of SiIIa and SiIIb neighboring nuclei sites, which are depicted in a. Az0 is equal to the hyperfine splitting of hh-4H configuration and PL1 center in the calculation of the theoretical and experimental parameters, respectively. e Hyperfine splitting of basal plane divacancy configurations. Due to the low symmetry of basal plane configurations, we distinguish symmetrically non-equivalent sites, SiIIa-1 and SiIIa-2, and SiIIb-1, SiIIb-2, and SiIIb-3, in the neighbor shells of SiIIa and SiIIb shown in a.
