Tuneable Poisson's ratio of monolayer GeS and Ge2SSe

Arun Jangir; Duc Tam Ho; Udo Schwingenschlögl

doi:10.1016/j.eml.2022.101838

Tuneable Poisson's ratio of monolayer GeS and Ge₂SSe

Arun Jangir, Duc Tam Ho, Udo Schwingenschlögl^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

A tuneable Poisson's ratio is desirable to extend the applications of 2D materials. We demonstrate that Poisson's ratio of monolayer GeS depends approximately linear on the applied strain and electric field strength. In contrast, monolayer Ge₂SSe is subject to abrupt switching between positive and negative values (sign reversal) at particular critical values of the strain and electric field strength. The tuneability of Poisson's ratio is attributed to the interplay of different bending stiffnesses. A structural transition is identified as origin of the sign reversal in the case of monolayer Ge₂SSe.

Original language	English (US)
Article number	101838
Journal	Extreme Mechanics Letters
Volume	56
DOIs	https://doi.org/10.1016/j.eml.2022.101838
State	Published - Oct 2022

Bibliographical note

Funding Information:
The authors thank Dr. Paresh C. Rout for fruitful discussions. The research reported in this publication was supported by funding from the King Abdullah University of Science and Technology (KAUST) .

Publisher Copyright:
© 2022 Elsevier Ltd

Keywords

2D material
Electric field
Poisson's ratio

ASJC Scopus subject areas

Bioengineering
Chemical Engineering (miscellaneous)
Engineering (miscellaneous)
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/j.eml.2022.101838

Cite this

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title = "Tuneable Poisson's ratio of monolayer GeS and Ge2SSe",

abstract = "A tuneable Poisson's ratio is desirable to extend the applications of 2D materials. We demonstrate that Poisson's ratio of monolayer GeS depends approximately linear on the applied strain and electric field strength. In contrast, monolayer Ge2SSe is subject to abrupt switching between positive and negative values (sign reversal) at particular critical values of the strain and electric field strength. The tuneability of Poisson's ratio is attributed to the interplay of different bending stiffnesses. A structural transition is identified as origin of the sign reversal in the case of monolayer Ge2SSe.",

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AU - Ho, Duc Tam

AU - Schwingenschlögl, Udo

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AB - A tuneable Poisson's ratio is desirable to extend the applications of 2D materials. We demonstrate that Poisson's ratio of monolayer GeS depends approximately linear on the applied strain and electric field strength. In contrast, monolayer Ge2SSe is subject to abrupt switching between positive and negative values (sign reversal) at particular critical values of the strain and electric field strength. The tuneability of Poisson's ratio is attributed to the interplay of different bending stiffnesses. A structural transition is identified as origin of the sign reversal in the case of monolayer Ge2SSe.

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