Physics, mathematics, and technology

2020 Issue №2

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Carbon isotope substitution and quasi-intersection of energy levels in diamond



The paper presents the results of a study of spin States in the main elec­tronic state of the only nitrogen-vacancy center (NV–) in a 13C-enriched dia­mond. The analysis is based on applying a method that uses a full set of com­muting operators. The results show that there are two double degenerations of energy levels in this system, which can be considered as a special case of LAC. Changes in the properties of the spin States of the NV–-center at the quasi-intersection level are considered as a possible cause of changes in the photolu­minescence intensity of NV–-centers.