Bulletin of the American Physical Society
APS March Meeting 2020
Volume 65, Number 1
Monday–Friday, March 2–6, 2020; Denver, Colorado
Session W55: Non-Hermitian Topological Phases
8:00 AM–10:24 AM,
Friday, March 6, 2020
Room: Mile High Ballroom 2B
Sponsoring Unit: DCMP
Abstract: W55.00010 : Non-Hermitian physical aspects in disordered Weyl/Dirac semimetals*
View Presentation Abstract
Here, we show the non-Hermitian physics in disordered Weyl semimetals. In this presentation, we propose a general scheme for the generation of disorder-induced Weyl exceptional rings, a spectral collapse of Landau levels. Our scheme for a generation Weyl exceptional ring is applicable to almost all Weyl materials. Thus, Weyl exceptional rings in disordered Weyl semimetals are detectable by using photoemission or quasiparticle interference experiments.
In addition, we propose that a new type of non-Hermitian effects in Weyl semimetals, the spectral collapse of Landau levels. We show that non-Hermitian perturbation leads to the collapse of Landau quantization which corresponds to non-Hermitian topological phase transition.
*Taiki Matsushita was supported by a JSPS Fellowship for Young Scientists.
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