Imaging 2D Magnetic Structures with a Quantum Sensor

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 quantum sensing [1,2,3]. Specifically, I will discuss quantum and imaging with spins to investigate magnetism in 2D materials including the investigation domain patterns [4] and Moiré structures in twisted 2D magnetic layers [5]. Here the nitrogen vacancy center in diamond is used as a scanning probe to image electronic magnetism in mono- and multilayers of materials like CrBr₃ as well as twisted multilayers of CrI₃ By using dedicated measurements strategies we improve the sensitivity [6] as well as the dynamic range of the method and show its use in static as well as dynamic probing of magnetism.<br/><br/>[1] T. Oeckinghaus et al., Nano Lett. 20, 463 (2020)<br/>[2] N. Morioka et al. Nature Com. 2516 (2020)<br/>[3] N. Chejanovsky et al. Nature Mat. 20, 1079 (2021)<br/>[4] Qi-Chao Sun et al. Nature Com. 12, 1989 (2021)<br/>[5] T. Son et al. Science 374, 1140 (2021)<br/>[6] V. Vorobyov et al., njp Quantum Information 7, 124 (2021)