Physics - Condensed Matter Seminar

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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
E-Mail
bullwink@illinois.edu
Phone
217-333-1652
Views
64

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.

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