“…where μ B is Bohr magneton of the electron, B ¼ (0, 0, B 0 )externally applied magnetic field, g is the electronic g tensor with the principal values: g x , g y , g z , S ¼ 1/2-electron spin, ℏ ¼ h/2π-Plank constant, and A is the hyperfine (hf ) tensor with the principal values: A x , A y , A z , describing the hf interaction of 11 B nuclei with I ¼ 3/2. Following the latest model, [25] shallow B occupies silicon (Si) site, and the main spin density (the hole) is located in a dangling bond of one 13 C-ligand oriented along the B─C bond, forming B Si À Cþ-like configuration, as a result of the Jahn-Teller distortion. Consequently, off-center relaxed B Si has a stronger binding with three of its carbon (C) ligands, which have different bond lengths, and the hybrid orbitals are shifted from sp 3 to three sp 2 hybrid orbitals and one pure p orbital in which unpaired spin is mainly localized.…”