Phys.org  February 6, 2024 Unraveling local dynamic charge processes relies on the ability to map charge carrier motion across multiple length- and timescales and understanding how these processes interact with the inherent material heterogeneities. An international team of researchers (South Korea, USA – Oak Ridge National Laboratory, Case Western University, Australia) introduced high-speed sparse scanning Kelvin probe force microscopy, which combined sparse scanning and image reconstruction. They showed that with their approach sub-second imaging of nanoscale charge dynamic was possible. They demonstrated electrochemically mediated diffusion of mobile surface ions on a LaAlO3/SrTiO3 planar device. By monitoring the diffusion of oxygen […]