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Diamond serves as an ideal crystalline host for a variety of point defects due to its
qualities such as wide band gap, small spin-orbit coupling and its availability in high
quality, isotopically purified single crystals. Among the possible defects, the nitrogen-
vacancy (NV) spin defect has been extensively studied as its spin state can be optically
initialized and measured at room temperature, and can be manipulated via electron
spin resonance by microwave radiation.
The NV center in diamond has been used to measure a number of physical quantities
such as magnetic field, electric field, temperature and stress/strain at ambient
conditions [1, 2]. Hence, the NV quantum sensor has not only emerged as a powerful
magnetometry tool for the study of nanoscale magnetic materials but also as a
spectroscopic tool for imaging the charge and strain environments intrinsic to the
diamond lattice [3,4]. In this talk, I'll discuss various sensing applications using NV
centers. |