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

JETP Letters - 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...     

Features of High-Frequency EPR/ESE/ODMR Spectroscopy of NV-Defects in Diamond

Physics of the Solid State - The methods of high-frequency electron paramagnetic resonance (EPR), electron spin echo (ESE) and optically detected magnetic resonance (ODMR) are used to study the...     

Relaxation Processes and Coherent Spin Manipulations for Triplet Si–C Divacancies in Silicon Carbide Enriched Tenfold in the 13C Isotope

JETP Letters - Coherent spin manipulations of ensembles of color centers in the form of neutral VSi–VC divacancies with the spin $$S = 1$$ in hexagonal silicon carbide 6H–SiC enriched...     

Spin polarization induced by optical and microwave resonance radiation in a Si vacancy in SiC: A promising subject for the spectroscopy of single defects

Depending on the temperature, crystal polytype, and crystal position, two opposite schemes have been observed for the optical alignment of the populations of spin sublevels in the ground state of a Si vacancy in SiC upon irradiation with unpolarized light at frequencies of zero-phonon lines. A giant change by a factor of 2–3 has been found in the luminescence intensity of zero-phonon lines in zero magnetic field upon absorption of microwave radiation with energy equal to the fine-structure splitting of spin sublevels of the vacancy ground state, which opens up possibilities for magnetic resonance detection at a single vacancy.     

Effect of quantum confinement and influence of extra charge on the electric field gradient in ZnO

By means of electron-nuclear double resonance (ENDOR), it is shown that the Al impurity, which acts as a shallow donor in ZnO, leads to a significant reduction of the electric field gradient in ZnO single crystals. In ZnO quantum dots, however, the gradient on the Al sites remains virtually unchanged. When the Zn²⁺ ion is substituted by Mn²⁺ in a ZnO single crystal, the electric field gradient slightly increases (by about 20%). Therefore, the Mn²⁺ ions can be used as probes to monitor the electric field gradients in ZnO crystals.     

Fully Optical Detection of Hyperfine Electron–Nuclear Interactions in Spin Centers in 6H-SiC Crystals with a Modified 13C Isotope Content

JETP Letters - Optically induced alignment and polarization of electron and nuclear spins in color centers with electron spin $$S = 3{\text{/}}2$$ , which lead to giant changes in photoluminescence...