Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

The normal-auxeticity mechanical phase transition in graphene

Deng, Binghui, Hou, Jie, Zhu, Hanxing ORCID:, Liu, Sheng, Liu, Emily, Shi, Yunfeng and Peng, Qing 2017. The normal-auxeticity mechanical phase transition in graphene. 2D Materials 4 (2) , 021020. 10.1088/2053-1583/aa61e5

[thumbnail of P-2017-2.pdf]
PDF - Published Version
Available under License Creative Commons Attribution.

Download (1MB) | Preview


When a solid object is stretched, in general, it shrinks transversely. However, the abnormal ones are auxetic, which exhibit lateral expansion, or negative Poisson ratio. While graphene is a paradigm 2D material, surprisingly, graphene converts from normal to auxetic at certain strains. Here, we show via molecular dynamics simulations that the normal-auxeticity mechanical phase transition only occurs in uniaxial tension along the armchair direction or the nearest neighbor direction. Such a characteristic persists at temperatures up to 2400 K. Besides monolayer, bilayer and multi-layer graphene also possess such a normal-auxeticity transition. This unique property could extend the applications of graphene to new horizons.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Publisher: IOP Publishing
ISSN: 2053-1583
Date of First Compliant Deposit: 13 March 2017
Date of Acceptance: 21 February 2017
Last Modified: 05 May 2023 05:54

Citation Data

Cited 40 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item


Downloads per month over past year

View more statistics