Mechanical twinning in phosphorene

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

2 Scopus Citations
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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)15-19
Journal / PublicationExtreme Mechanics Letters
Volume19
Online published14 Dec 2017
Publication statusPublished - Mar 2018
Externally publishedYes

Abstract

We investigate the deformation and failure mechanisms of phosphorene sheet and nanoribbons under uniaxial tensile strain along the zigzag direction using the density functional tight-binding method. Surprisingly, twinning occurs homogeneously across the phosphorene sheet; which significantly increases its failure strain. Vacancies within the sheet lead to the heterogeneous nucleation of twins at a lower critical strain which, subsequently, propagate across the entire sheet. Twinning always occurs heterogeneously in phosphorene nanoribbons (with or without vacancies). Propagation of the twins is interrupted by fracture which initiates along the ribbon edge. The underlying twinning mechanism is bond breaking between the atoms within phosphorene puckers and simultaneous bond formation between the atoms in neighboring puckers. This unusual deformation behavior in phosphorene may be exploited in novel nano-electronic-mechanical applications.

Citation Format(s)

Mechanical twinning in phosphorene. / Sorkin, V.; Cai, Y.Q.; Srolovitz, D.J.; Zhang, Y.W.

In: Extreme Mechanics Letters, Vol. 19, 03.2018, p. 15-19.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal