Spins in wide band gap semiconductors are a leading contender in various areas of quantum technology. Most notably they have been established as a novel tool for nanoscale sensing, major hardware for long distance quantum entanglement, as well as small scale quantum registers for quantum computing. I will present the use of spins in in those areas [1,2,3]. Specifically, I will discuss quantum sensing with spins to investigate magnetism in 2D materials including the investigation domain patterns [4] and Moiré structures in twisted 2D layers [5]. Here the nitrogen vacancy center in diamond is used to probe and image electronic magnetism in mono- and multilayers of materials like CrBr3. By using dedicated measurements strategies based on quantum algorithms one can enhance the performance of those quantum sensors to achieve better signal quality and improve the spectral resolution in those measurements [6].

[1] T. Oeckinghaus et al., Nano Lett. 20, 463 (2020)
[2] N. Morioka et al. Nature Com. 2516 (2020)
[3] N. Chejanovsky et al. Nature Mat. 20, 1079 (2021)
[4] Qi-Chao Sun et al. Nature Com. 12, 1989 (2021)
[5] T. Son et al. Science 374, 1140 (2021)
[6] V. Vorobyov et al., njp Quantum Information 7, 124 (2021)