LASSP & AEP Seminar - Jared Maxson - Cornell University
Tuesday, September 28, 2021 12:20pm
About this Event
Hosted by: Kyle Shen
Title: Ultrafast Electron Diffraction @ Cornell: A tool for studying materials driven far from equilibrium
Abstract: Short, intense pulses of light can drive materials into states with dramatic new functionality not available in equilibrium. Strong optical excitation has been shown to transiently tune topological invariants, drive metal-to-insulator transitions, and even induce superconductivity in various materials. Each of these changes is associated with lattice reorganization occurring on the picosecond scale (and faster). In order to harness and engineer these functionalities, we then need high-quality, temporally-resolved probes of atomic structure.In this talk, I’d like to introduce you to a new tool on Cornell’s campus: an electron diffraction apparatus capable of sub-picosecond temporal resolution and high spatial resolution. I’ll walk you through the system and its performance, highlighting how we capitalized on recent advancements in electron sources and electron optics to achieve small probe sizes in both space and time. I'll show our first results from diffraction studies, and describe upcoming experiments. I hope to leave plenty of time for questions and comments, where we can explore possibilities for future directions together.
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