NV center based scanning probe technique for imaging electronic states in 2D materials

Advanced probing methods, including scanning SQUID, diamond NV magnetometry, and Scanning Gate Microscopy (SGM), have helped uncover patterns in electronic behaviors. These methods have revealed phenomena like the smooth flow in graphene, vortex formation in WTe2, and distinct states in twisted bilayer graphene. Yet, capturing a direct visual of specific electron movements and features in graphene, such as whirlpools and vortex layers, remains a challenge. During this presentation, I'll share our endeavors to capture these elusive behaviors in graphene. Our approach blends the capabilities of diamond NV magnetometry with scanning gate microscopy. This combination promises a deeper understanding of electron interactions in various electron flow states. I'll discuss the strides we've made in setting up the required equipment, developing NV center diamond based probes, and our initial findings. Through our efforts, we aim to provide a firsthand view of unique electron patterns and their associated states.