Electron paramagnetic resonance studies of the neutral nitrogen vacancy in diamond

S. Felton*, A. M. Edmonds, M. E. Newton, P. M. Martineau, D. Fisher, D. J. Twitchen

*Corresponding author for this work

Research output: Contribution to journalArticle

67 Citations (Scopus)

Abstract

Despite the numerous experimental and theoretical studies on the negatively charged nitrogen vacancy center (NV-) in diamond and the predictions that the neutral nitrogen vacancy center (NV0) should have an S= 1 2 ground state, NV0 has not previously been detected by electron paramagnetic resonance (EPR). We report new EPR data on a trigonal nitrogen-containing defect in diamond with an S= 3 2 excited state populated via optical excitation. Analysis of the spin Hamiltonian parameters and the wavelength dependence of the optical excitation leads to assignment of this S= 3 2 state to the A24 excited state of NV0. This identification, together with an examination of the electronic structure of the NV centers in diamond, provides a plausible explanation for the lack of observation (to date) of an EPR signal from the NV0 ground state.

Original languageEnglish
Article number081201
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume77
Issue number8
DOIs
Publication statusPublished - 6 Feb 2008

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