Odd Cosserat elasticity in active materials

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Piotr Surówka - , Wrocław University of Science and Technology, Max-Planck-Institute for the Physics of Complex Systems, Würzburg-Dresden Cluster of Excellence ct.qmat (Author)
  • Anton Souslov - , University of Bath (Author)
  • Frank Jülicher - , Max-Planck-Institute for the Physics of Complex Systems, TUD Dresden University of Technology (Author)
  • Debarghya Banerjee - , Max-Planck-Institute for the Physics of Complex Systems, University of Göttingen (Author)

Abstract

Stress-strain constitutive relations in solids with an internal angular degree of freedom can be modeled using Cosserat (also called micropolar) elasticity. In this paper, we explore Cosserat materials that include chiral active components and hence odd elasticity. We calculate static elastic properties and show that the static response to rotational stresses leads to strains that depend on both Cosserat and odd elasticity. We compute the dispersion relations in odd Cosserat materials in the overdamped regime and find the presence of exceptional points. These exceptional points create a sharp boundary between a Cosserat-dominated regime of complete wave attenuation and an odd-elasticity-dominated regime of propagating waves. We conclude by showing the effect of Cosserat and odd-elasticity terms on the polarization of Rayleigh surface waves.

Details

Original languageEnglish
Article number064609
JournalPhysical Review E
Volume108
Issue number6
Publication statusPublished - Dec 2023
Peer-reviewedYes

External IDs

PubMed 38243431