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Condensed Matter > Other Condensed Matter
Title: Second-order topological modes in two-dimensional continuous media
(Submitted on 9 Mar 2021 (v1), last revised 31 Jul 2021 (this version, v2))
Abstract: We present a symmetry-based scheme to create 0D second-order topological modes in continuous 2D systems. We show that a metamaterial with a \textit{p6m}-symmetric pattern exhibits two Dirac cones, which can be gapped in two distinct ways by deforming the pattern. Combining the deformations in a single system then emulates the 2D Jackiw-Rossi model of a topological vortex, where 0D in-gap bound modes are guaranteed to exist. We exemplify our approach with simple hexagonal, Kagome and honeycomb lattices. We furthermore formulate a quantitative method to extract the topological properties from finite-element simulations, which facilitates further optimization of the bound mode characteristics. Our scheme enables the realization of second-order topology in a wide range of experimental systems.
Submission history
From: Jan Košata [view email][v1] Tue, 9 Mar 2021 12:54:05 GMT (13207kb,D)
[v2] Sat, 31 Jul 2021 07:13:42 GMT (18647kb,D)
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