Modulational instability of magnetoelastic metamaterials

TL;DR

This paper investigates the modulational instability in magnetoelastic metamaterials, revealing that many-body configurations can exhibit instability that affects their bistability, with an effective circuit model developed for analysis.

Contribution

The study introduces a comprehensive analysis of modulational instability in various configurations of magnetoelastic metamaterials using an effective circuit model.

Findings

Many-body configurations show modulational instability.

Instability can disturb bistability in these systems.

Effective circuit model successfully describes the phenomena.

Abstract

We study the modulational instability of recently designed magnetoelastic metamaterials composed of elastic-mediated split-ring resonators (SRR). An effective circuit model is developed. Then four cases are studied: a dimer of SRR, one-dimension (1D) dimerized array, 1D uniform array and two-dimension layered array. It is found that except for the dimer case, all the other many-body cases can present modulational instability which may disturb the bistability (if any) under uniform assumption.