Linking Atomic-Scale Investigations in 2D Materials with Macroscopic-Scale Devices via Gate-Tunable STM/AFM

Abstract:

Recently, engineering vdW heterostructures promotes itself as a versatile tool to create unconventional electronic and magnetic structures of various 2D materials including insulators, semiconductors, metals, superconductors, ferromagnets. The ability to engineer these materials with atomic precision, to understand and eventually control their physical properties has profound impact in developing next-generation technologies. In this talk, I will discuss our recent progress on atomic-scale investigation of defects and atomic arrangements in the emergent 2D materials, including inorganic 2D semiconductors, 2D magnets, and 2D organic-inorganic hybrid perovskites using joint scanning tunneling microscopy (STM) and atomic-force microscopy (AFM). Additionally, I will describe how the application of vdW technologies to the gate-tunable STM can dramatically expand its capabilities, allowing us to probe electronic and magnetic properties, and ultimately control electronic correlation and excitonic effects in these low-dimensional materials. The atomic-scale insights obtained through this platform pave the way for further improving macroscopic-scale device performances.

Bio:

Prof. Dr LU Jiong is an associate professor at Department of Chemistry and Institute for Functional Intelligent Materials at NUS. Dr. Lu received his bachelor degree from Fudan University (China) in 2007 and Ph.D. degree from National University of Singapore (NUS) in 2011. After that, he worked as a postdoc fellow in Graphene Research Centre at NUS, and then in Department of Physics, UC Berkeley. His current research interests include atomic-scale materials design and investigation of atomic-scale science in low-dimensional materials towards next-generation solid-state devices and atomically precise catalysis. His group has published more than 100 peer-reviewed papers in top-tier journals including Nature Materials, Nature Nanotechnology, Nature Electronics, Nature Communications and Science Advances. Two recent publications were selected as JACS Early Career Investigator 2021 virtual collection and JACS Reader's Pick 2022. Dr. Lu is a recipient of JMCA Emerging Investigators 2019, Young Scientist Award (2021), FOS NUS, and Young Researcher Award, NUS (2022).