Felton, S. (Solveig), Edmonds, A. M., Newton, Mark E., Martineau, P. M., Fisher, D. and Twitchen, D. J.. (2008) Electron paramagnetic resonance studies of the neutral nitrogen vacancy in diamond. Physical Review B (Condensed Matter and Materials Physics), Vol.77 (No.8). Article no. 081201(R). ISSN 1098-0121

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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 (4)A(2) 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.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Electron paramagnetic resonance, Diamonds -- Electric properties, Diamonds -- Defects, Nitrogen, Charge transfer
Journal or Publication Title:	Physical Review B (Condensed Matter and Materials Physics)
Publisher:	American Physical Society
ISSN:	1098-0121
Date:	February 2008
Volume:	Vol.77
Number:	No.8
Number of Pages:	4
Page Range:	Article no. 081201(R)
Identification Number:	10.1103/PhysRevB.77.081201
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
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URI:	http://wrap.warwick.ac.uk/id/eprint/30406

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