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DTSTAMP:20260828T111355
DTSTART;TZID=America/Detroit:20260914T120000
DTEND;TZID=America/Detroit:20260914T130000
SUMMARY:Lecture / Discussion:APPLIED PHYSICS I ULTRAFAST XUV SPECTROSCOPY OF VAN DER WAALS MATERIALS
DESCRIPTION:Abstract:\nOur world is 3D\, yet electrons in van der Waals materials can behave as if they live in 2D sheets\, or even along quasi-1D chains. How does this reduced electronic dimensionality shape the motion of photoexcited charge\, and does it survive when a material is driven far from equilibrium? This nonequilibrium regime is central to both light-driven material function and the emergence of transient states that have no equilibrium counterpart. Answering these questions requires a probe that combines femtosecond time resolution with sensitivity to individual atomic sites. In this talk\, I will introduce our development of table-top ultrafast extreme-ultraviolet (XUV) spectroscopy for single-crystalline van der Waals materials. Broadband XUV pulses access multiple elemental core-level transitions simultaneously\, allowing us to distinguish the responses of electronically active metal sites from those of surrounding ligands. I will present our latest measurements of charge redistribution\, screening\, and coherent lattice motion in van der Waals materials\, and discuss how these results open a site-resolved view of the 2D electronic world far from equilibrium.\n\nBio:\nYuki Kobayashi is an Assistant Professor of Chemistry and a fellow of the Quantum Research Institute at the University of Michigan. He received his Ph.D. from UC Berkeley and was a postdoctoral scholar at Stanford University. Since starting his laboratory at Michigan in 2023\, his group has developed ultrafast XUV and strong-field spectroscopies to study electronic and structural dynamics in quantum materials.
UID:151084-21910851@events.umich.edu
URL:https://events.umich.edu/event/151084
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Applied Physics,Chemistry,Physics,Seminar Series
LOCATION:West Hall - 340
CONTACT:
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