Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session L04: Dirac/Weyl Semimetals -- Materials Prediction II
11:15 AM–2:15 PM,
Wednesday, March 6, 2019
BCEC Room: 107C
Sponsoring Unit: DMP
Chair: Dmytro Pesin, University of Virginia
Abstract: L04.00009 : Non-Abelian Statistics in Momentum Space*
1:15 PM–1:27 PM
Alexey A Soluyanov
(University of Zurich)
In this talk, I motivate our description of band-structure nodes based on homotopy theory, and demonstrate its power on several simple examples. Afterwards, I clarify the meaning of the non-Abelian charge arising in PT-symmetric systems, and show how it constraints nodal compositions in a simple metal, namely elemental scandium (Sc) under strain. Our predictions could be experimentally tested in photoemission experiments.
*T. B. was supported by the Gordon and Betty Moore Foundations EPiQS Initiative, Grant GBMF4302.
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