High-resolution potential imaging using the Atomic SET - Part II

In part II of this presentation, I will describe our recent ultra-high resolution scanning thermodynamic measurements performed using the Atomic single electron transistor (SET). Many of the electronic systems at the forefront of condensed matter physics have interesting physical phenomena that occur over few nanometer length scales. Examples include edge states in quantum Hall and topological systems, as well as the ordered moiré lattices formed by twisting two van der Waals (vdW) layers with respect to each other or by aligning two vdW layers with a slight lattice mismatch. In all of these systems, electronic charge orders in real space on a characteristic length scale of about 10 nanometers. Visualizing the electrostatic and thermodynamic properties of these states with a spatial resolution better than their characteristic scales provides us with a window into some of their central properties which were so far out of reach. The Atomic SET, a nanoscale charge sensor built upon the quantum twisting microscope (QTM) geometry, is an ideal tool to examine these questions in detail. In this talk, I will present our latest scanning Atomic SET experiments that probe these vdW systems with ultra-high resolution electrostatic imaging.