Tuning the Electronic Structure in 2D Transition-Metal- Dichalcogenide Crystals
Abstract: Two-dimensional materials and crystals have recently emerged as a revolutionary new potential materials platform for a variety of DOE technologies including energy generation and storage. These materials also offer new possibilities for fundamental research and insight into low dimensional physics and chemistry. In this talk I will discuss our program to understand the electronic structure of these materials and show how this structure varies with film atomic layer thickness and parameters such as twist, composition, and substrate crystal. Our tools for this research are in many ways non-standard due to the small transverse scale, surface reactivity, and wet-chemically preparation of these monolayers-thick 2D materials (or van der Waals crystals) and their artificial counterparts, 2D heterocrystals.
Bio: Richard M. Osgood, Jr. was born in Kansas City, MO. He received his PhD (Physics) from MIT (1973). His PhD research in new molecular lasers and their vibrational dynamics and spectroscopy was supervised by Ali Javan. In Jan 1973, he joined the scientific staff of MIT Lincoln Laboratory and in 1981 he was appointed a faculty member at Columbia University, where he became Higgins Professor of Applied Physics and Applied Mathematics and Electrical Engineering in 1992. While on a leave of absence from Columbia from 2000‐2002, he served as Associate Laboratory Director (Basic Energy Sciences) at Brookhaven National Laboratory, a position, which included the Center for Functional Nanomaterials, Condensed Matter Physics, the National Synchrotron Light Source, and the Chemistry and the Materials Departments. He has been a member of the DOE Basic Energy Sciences Advisory Committee (BESAC) and served as chair of Facilities Visiting Committee for DOE BES. Prof. Osgood’s research has included new classes of lasers as well as understanding the dynamics of their material medium, the physics and applications of laser surface interactions, nonlinear optics and physics, the electronic structure of low dimensional of materials and nanostructures, and computational electromagnetics. He has published ~500 research journal papers, written one book, edited several anthologies, and been awarded 22 patents. He is a Fellow of the American Physical Society (APS), the IEEE, and the Optical Society of America (OSA) and has served as a Councilor of the Materials Research Society, and Travelling Lecturer for the APS and the OSA. In 1991, he, along with Dan Ehrlich and Tom Deutsch, received the Wood Prize (19912) for their research on Laser Surface Interactions, the IEEE Quantum Electronics Award(2015) for Research on New Lasers, and . He is also an Editor for the Springer Series on Materials Science and has been an Associate Editor for IEEE JQE. He is a member of the National Academy of Inventors (2016).
Osgood’s research on photoemission generally has involved research in 2D materials (including ultrasmall (including nanometer-scale) samples fabricated with lift off methods), excited-state physics in nanomaterials, and correlated oxides (generally in relation to his work in 2D materials). He has collaborated extensively in this work with groups at Brookhaven National Laboratory, Elettra, Renmin University, and the University of Zagreb.