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 Citation (Scopus)

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
Article number	101838
Number of pages	4
Journal	Extreme Mechanics Letters
Volume	56
Early online date	16 Jul 2022
DOIs	https://doi.org/10.1016/j.eml.2022.101838
Publication status	Published - 1 Oct 2022
Externally published	Yes

Keywords

Poisson’s ratio
2D material
lElectric field

Access to Document

10.1016/j.eml.2022.101838

Cite this

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title = "Tuneable Poisson{\textquoteright}s ratio of monolayer GeS and Ge2SSe",

abstract = "A tuneable Poisson{\textquoteright}s ratio is desirable to extend the applications of 2D materials. We demonstrate that Poisson{\textquoteright}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{\textquoteright}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.",

keywords = "Poisson{\textquoteright}s ratio, 2D material, lElectric field",

author = "Arun Jangir and Ho, {Duc Tam} and Udo Schwingenschl{\"o}gl",

note = "Funding information: The research reported in this publication was supported by funding from the King Abdullah University of Science and Technology (KAUST).",

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doi = "10.1016/j.eml.2022.101838",

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T1 - Tuneable Poisson’s ratio of monolayer GeS and Ge2SSe

AU - Jangir, Arun

AU - Ho, Duc Tam

AU - Schwingenschlögl, Udo

N1 - Funding information: The research reported in this publication was supported by funding from the King Abdullah University of Science and Technology (KAUST).

PY - 2022/10/1

Y1 - 2022/10/1

N2 - 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.

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.

KW - Poisson’s ratio

KW - 2D material

KW - lElectric field

U2 - 10.1016/j.eml.2022.101838

DO - 10.1016/j.eml.2022.101838

M3 - Article

SN - 2352-4316

VL - 56

JO - Extreme Mechanics Letters

JF - Extreme Mechanics Letters

M1 - 101838

ER -