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Tsvi, Tlusty
첨단연성물질 연구단
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Exceptional topology in ordinary soft matter

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Title
Exceptional topology in ordinary soft matter
Author(s)
Tsvi Tlusty
Publication Date
2021-08-03
Journal
Physical Review E, v.104, no.2
Publisher
American Physical Society
Abstract
© 2021 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.Hydrodynamics is shown to induce non-Hermitian topological phenomena in ordinary, passive soft matter. This is demonstrated by subjecting a two-dimensional elastic lattice to a low-Reynolds viscous flow. The interplay of hydrodynamics and elasticity splits Dirac cones into bulk Fermi arcs, pairing exceptional points with opposite half-integer topological charges. The bulk Fermi arc is a generic hallmark of the system exhibited in all lattice and flow symmetries. An analytic model and simulations explain how the emergent singularities shape the spectral bands and give rise to a web of van Hove singularity lines in the density of states. The present findings suggest that non-Hermitian physics can be explored in a broad class of ordinary soft matter, living and artificial alike, opening avenues for topology-based technology in this regime.
URI
https://pr.ibs.re.kr/handle/8788114/10493
DOI
10.1103/PhysRevE.104.025002
ISSN
2470-0045
Appears in Collections:
Center for Soft and Living Matter(첨단연성물질 연구단) > 1. Journal Papers (저널논문)
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