Impurity centers and defects

Cross-relaxation of nitrogen-related centers in diamond

D. D. Kramushchenko, A. S. Gurin, A. M. Skomorokhov, V. V. Yakovleva, A. P. Bundakova, M. V. Muzafarova, P. G. Baranov, R. A. Babunts

Ioffe Institute, St. Petersburg

Abstract: We studied the cross-relaxation processes between the centers of substitutional nitrogen (P1 center), nitrogen pairs and a negatively charged nitrogen vacancy (NV) center in synthetic diamond grown at high pressure and high temperature (using the HPHT method), as well as their angular dependences on the magnetic field. For the first time the cross-relaxation between nitrogen pairs and NV centers has been identified that based on detailed experimental angular dependencies and their calculations.

Keywords: diamond, NV center, level anti-crossing, optically detected magnetic resonance.

Received: 04.09.2025
Revised: 10.11.2025
Accepted: 18.11.2025

DOI: 10.61011/FTT.2025.11.62143.247-25

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