High Field magnetospectroscopy to probe the 1.4eV Ni color center in diamond

Details High Field magnetospectroscopy to probe the 1.4eV Ni color center in diamond High Field magnetospectroscopy to probe the 1.4eV Ni color center in diamond

2012-03-05

arxiv.org/abs/1203.0913v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, 13 figures, submitted to PRB

Scientific paper

A magneto-optical study of the 1.4 eV Ni color center in boron-free synthetic diamond, grown at high pressure and high temperature, has been performed in magnetic fields up to 56 T. The data is interpreted using the effective spin Hamiltonian of Nazar\'e, Nevers and Davies [Phys. Rev. B 43, 14196 (1991)] for interstitial Ni$^{+}$ with the electronic configuration $3d^{9}$ and effective spin $S=1/2$. Our results unequivocally demonstrate the trigonal symmetry of the defect which preferentially aligns along the [111] growth direction on the (111) face, but reveal the shortcomings of the crystal field model for this particular defect.

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