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. 2016 Sep 29;7:12935. doi: 10.1038/ncomms12935

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Copyright © 2016, The Author(s)

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(a,b) Experimental (a) and theoretical (b) Hahn-echo coherence of the m_s=+1 to m_s=0 ground-state spin transition of the divacancy ensemble with the c-axis-oriented magnetic field (B) at three different values. The experimental data was taken at T=20 K. (c,d) Experimental (c) and theoretical (d) Hahn-echo coherence of the spin transition from a and b, respectively, as a continuous function of free evolution time (t_free) and B. The early loss of coherence near 47 mT in c corresponds to the spin triplet's ground-state level anti-crossing (GSLAC).