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

Abstract

The frequencies of electron–nuclear interactions with 13C and 29Si nuclei on remote coordination spheres are determined in triplet spin centers in the form of neutral VSi–VC divacancies in a silicon carbide crystal of the hexagonal polytype 6H–SiC enriched tenfold in the 13C 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 29Si and 13C nuclei are found. Nuclear magnetic resonance transitions at Larmor and close-to-Larmor frequencies of 13C and 29Si cause giant changes in the populations of spin sublevels with the transformation of these resonances into electron paramagnetic resonance and optical signals.