Due to their robustness and small size, solid-state quantum sensors are expected to find applications in a range of disciplines across physics, chemistry and biology, and even in the industry. In particular, the nitrogen-vacancy (NV) defect centre in diamond has become one of the most popular platforms for quantum sensing and imaging, thanks to its high sensitivity and the multiple sensing modalities available. In this talk, I will illustrate our recent efforts towards applying NV-based imaging to condensed matter systems, through three examples that exploit different sensing modalities: (i) mapping the current flow in graphene via NV magnetometry, (ii) mapping band bending at the diamond surface via NV electrometry, and (iii) probing charge noise in ultrathin metallic layers via NV relaxometry. These results open exciting prospects for the study of two-dimensional materials and nanoelectronic devices.
Jean-Philippe Tetienne is an ARC DECRA Fellow in the School of Physics at the University of Melbourne. His research interests are in experimental quantum sensing and imaging, especially techniques based on spin defects in diamond, and their applications in condensed matter physics. He was awarded his PhD in 2014 from the Ecole Normale Superieure de Cachan, France, before joining the University of Melbourne as a research fellow in 2015.