Strain topological metamaterials and revealing hidden topology in higher-order coordinates

Allein, F and Anastasiadis, A and Chaunsali, R and Frankel, I and Boechler, N and Diakonos, FK and Theocharis, G (2023) Strain topological metamaterials and revealing hidden topology in higher-order coordinates. In: Nature Communications, 14 (1).

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Abstract

Topological physics has revolutionized materials science, introducing topological phases of matter in diverse settings ranging from quantum to photonic and phononic systems. Herein, we present a family of topological systems, which we term �strain topological metamaterials�, whose topological properties are hidden and unveiled only under higher-order (strain) coordinate transformations. We firstly show that the canonical mass dimer, a model that can describe various settings such as electrical circuits and optics, among others, belongs to this family where strain coordinates reveal a topological nontriviality for the edge states at free boundaries. Subsequently, we introduce a mechanical analog of the Majorana-supporting Kitaev chain, which supports topological edge states for both fixed and free boundaries within the proposed framework. Thus, our findings not only extend the way topological edge states are identified, but also promote the fabrication of novel topological metamaterials in various fields, with more complex, tailored boundaries. © 2023, Springer Nature Limited.

Item Type:	Journal Article
Publication:	Nature Communications
Publisher:	Nature Research
Additional Information:	The copyright for this article belongs to authors.
Keywords:	dimer, coordinate; numerical model; strain; topology, Article; body movement; calculation; canonical analysis; cell count; chirality; finite element analysis; materials science; mechanics; motion; optics; phase transition; physics; quantum chemistry; rigidity; rotation; sensitivity analysis; simulation; three dimensional printing; Young modulus
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	18 Nov 2024 21:36
Last Modified:	18 Nov 2024 21:36
URI:	http://eprints.iisc.ac.in/id/eprint/85338

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