Manifestations of Electron–Nuclear Interactions in the High-Frequency ENDOR/ODMR Spectra for Triplet Si–C Divacancies in 13C-Enriched SiC

The frequencies of electron–nuclear interactions with 13 C and 29 Si nuclei on remote coordination spheres are determined in triplet spin centers in the form of neutral V Si –V C divacancies in a silicon carbide crystal of the hexagonal polytype 6H–SiC enriched tenfold in the 13 C isotope. High-frequency electron–nuclear double resonance and optically detected magnetic resonance under conditions of optical alignment of spins are used. Oscillations of the electron spin density on 29 Si and 13 C nuclei are found. Nuclear magnetic resonance transitions at Larmor and close-to-Larmor frequencies of 13 C and 29 Si cause giant changes in the populations of spin sublevels with the transformation of these resonances into electron paramagnetic resonance and optical signals.