Fig. 1: Defect geometries and calculated electronic structures of (a,d) NCVC−1 in diamond, (b, e) CBVN in hBN, and (c,f) WSe in MoSe2.

a–c Top (top) and side (bottom) views of defect geometries and spin densities of the defect qubits in the ground state (isosurface level = 0.003 Å−3). d–f Energy levels of the defect qubits. The green arrows indicate spin-conserving intradefect optical transition. Detailed physical quantities of possible combinations of MX defects and MX2 hosts are summarized in Table 1.