Research Seminars @ Illinois

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Tailored for undergraduate researchers, this calendar is a curated list of research seminars at the University of Illinois. Explore the diverse world of research and expand your knowledge through engaging sessions designed to inspire and enlighten.

To have your events added or removed from this calendar, please contact OUR at ugresearch@illinois.edu

Anthony J Leggett Institute for Condensed Matter Theory Special Seminar - "Stability of Weyl node merging processes under symmetry constraints"

Event Type: Seminar/Symposium
Sponsor: Physics - Condensed Matter
Location: LLP 464
Date: Sep 30, 2024 2:30 pm
Speaker: Dr. Viktor Könye, University of Amsterdam
Contact: Stephen Bullwinkel
E-Mail: bullwink@illinois.edu
Phone: 217-333-1652
Views: 42
Originating Calendar: Physics - The Anthony J Leggett Institute for Condensed Matter Theory Seminar; Changes in the number of Weyl nodes in Weyl semimetals occur through merging processes, usually involving a pair of oppositely charged nodes. More complicated processes involving multiple Weyl nodes are also possible, but they typically require fine tuning and are thus less stable. In this work, we study how symmetries affect the allowed merging processes and their stability, focusing on the combination of a two-fold rotation and time-reversal (C2T) symmetry. We find that, counter-intuitively, processes involving a merging of three nodes are more generic than processes involving only two nodes. Our work suggests that multi-Weyl-merging may be observed in a large variety of quantum materials, and we discuss SrSi2 and bilayer graphene as potential candidates.

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