Fig. 3: Spin dynamics models.
From: Nuclear spin-mediated relaxation mechanisms of the \({{\rm{V}}}_{{\rm{B}}}^{-}\) center in hBN
a Model 1: Two-spin system model in \({{\rm{V}}}_{{\rm{B}}}^{-}\). Each cluster contains an electron spin and a nitrogen nuclear spin. b Model 2 and 3: Three/Four-spin system model in \({{\rm{V}}}_{{\rm{B}}}^{-}\). Blue clusters represent nitrogen clusters, containing an electron spin and three nitrogen nuclei. Pink clusters represent boron clusters, containing an electron spin and two boron nuclei. c Model 4: Six-spin system model in \({{\rm{V}}}_{{\rm{B}}}^{-}\). Each shaded area represents a six-spin cluster, including an electron spin and the closest three nitrogen nuclei in the central spin and two nitrogen nuclei from the bath. Each cluster has the same four-spin central spin and two different environmental spins. Boron nuclei are neglected. Blue and pink atoms depict nitrogen and boron atoms, respectively.
