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The ideal strength of two-dimensional stanene may reach or exceed the Griffith strength estimate

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Abstract

Ideal strength is the maximum stress a material can withstand, and it is an important intrinsic property for structural applications. A Griffith strength limit of ∼E/9 is the best known upper bound of this property for a material loaded in tension. Here we report that stanene, a recently fabricated two-dimensional material, could approach and possibly exceed this limit from a theoretical perspective. Utilizing first-principles density functional theory, we investigated the nonlinear elastic behavior of stanene and found that its strength could reach ∼E/7.4 under uniaxial tension in both armchair and zigzag directions without incurring phonon instability or mechanical failure. The unique mechanical properties of stanene are appreciated by comparison with other Group-IV 2D materials.

Graphical abstract: The ideal strength of two-dimensional stanene may reach or exceed the Griffith strength estimate

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Publication details

The article was received on 02 Jan 2017, accepted on 15 Feb 2017, published on 27 Feb 2017 and first published online on 27 Feb 2017


Article type: Paper
DOI: 10.1039/C7NR00010C
Citation: Nanoscale, 2017, Advance Article
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    The ideal strength of two-dimensional stanene may reach or exceed the Griffith strength estimate

    Z. Shi and C. V. Singh, Nanoscale, 2017, Advance Article , DOI: 10.1039/C7NR00010C

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