Condensed Matter Seminar - "Few-Electron Plasmon Resonances"
- Event Type
- Seminar/Symposium
- Sponsor
- Physics - Condensed Matter
- Location
- ESB 190
- Date
- Apr 26, 2024 1:00 pm
- Speaker
- Prashant Jain, Dept. of Chemistry, University of Illinois at Urbana - Champaign
- Contact
- Stephen Bullwinkel
- bullwink@illinois.edu
- Phone
- 217-333-1652
- Views
- 232
- Originating Calendar
- Physics - Condensed Matter Seminar
How does a plasmon, the quintessential collective excitation of charge carriers, emerge from the response of individual carriers? I will discuss results of experiments on nanocrystals toward answering this question. Starting from a serendipitous finding of localized surface plasmon oscillations in nanocrystals of copper sulfide—the same material responsible for the recent LK-99 red herring—we were led to plasmon resonances in ultrasmall nanocrystals of zinc oxide. These plasmon oscillations are sustained by a handful of charge carriers much smaller in number than previously thought to be possible. Such few-electron collective oscillations expand the conventional view of plasmon resonances and potentially allow tests of electron–electron correlation models.