Fig. 2: Temperature dependence of the ODMR spectrum of V−B.
From: Spin defects in hBN as promising temperature, pressure and magnetic field quantum sensors
Color maps represent the peak positions of the normalized ODMR spectrum for different temperatures in an external magnetic field of a B = 8.5 mT and b B = 0 mT. c ZFS parameter \({{D}}_{{gs}}/{{h}}\) obtained from a (blue diamonds) and b (cyan diamonds) vs. temperature. The monotonic increase while lowering the sample temperature is unaffected by the magnetic field. The data can be fitted using Eq. (2) describing the temperature-dependent change of the lattice parameters a (gray dotted line24) and c (black dotted line24) that are also plotted in (c). The fits are shown as solid lines (blue for 8.5 mT and cyan for 0 mT) on top of the diamonds and reproduce the temperature dependence perfectly. (bottom panel) The difference between measurements and fit (Δ/h).
