In 1956 David Pines published a paper predicting the existence of a gapless collective mode in multi-component Fermi liquids. Because it involves distinct motion of different species of electrons he called it a D.E.M.-on or "Demon." Definitive evidence for the existence of this particle has, up to now, not been found. In this talk I will present momentum-resolved EELS (M-EELS) and RPA calculations suggesting that we have finally observed this excitation in Sr2RuO4, a multiband Fermi liquid.
Zoom link will be forwarded to Condensed Matter Seminar email list. For a copy of the link or to be added to the email list, please contact Stephen Bullwinkel (firstname.lastname@example.org).
Recordings of Condensed Matter Seminar events can be found on mediaspace: https://mediaspace.illinois.edu/channel/Condensed%2BMatter%2BSeminar%2BTalks%2BFall%2B2020/178724052