Overview
The investigation on complex quantum systems is a major theme of modern condensed matter physics. Driven by the discovery of new materials and the development of novel techniques, progress in this field has been breathtaking in the past few decades. We are active participants in this advance by developing nanoscale imaging tools and applying them to forefront problems.
The exotic behaviors and extreme properties in quantum materials are intimately related to their novel electronic structures under a wide range of length scales. Using shielded cantilever probes and sensitive microwave electronics, we can map out the local dielectric response in the 10-100nm scale. The spatially resolved electronic information is crucial for our understanding of metal-insulator transition in complex systems, oxide electronics, and domains in ferroic materials.