Ideal strength of two-dimensional stanene may reach or exceed Griffith strength estimate

Abstract

The ideal strength is the maximum stress a material can withstand, and it is an important intrinsic property for structural applications. Griffith strength limit ~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 further appreciated by comparisons with two other Group-IV 2D materials, graphene and silicene.

arXiv comment18 pages, 4 figures, 3 tables

References in corpus (16)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Restoring the density-gradient expansion for exchange in solids and surfaces
• Generalized gradient approximation for solids and their surfaces
• Phonons and related properties of extended systems from density-functional perturbation theory
• Relativistic separable dual-space Gaussian Pseudopotentials from H to Rn
• Epitaxial Growth of Two-Dimensional Stanene
• Large-gap quantum spin Hall insulators in tin films
• Polarity Reversed Robust Carrier Mobility in Monolayer MoS2 Nanoribbons
• Mechanics properties of Mono-layer Hexagonal Boron Nitride: Ab initio study
• Carbyne from first principles: Chain of C atoms, a nanorod or a nanorope?
• Prediction of Near-Room-Temperature Quantum Anomalous Hall Effect on Honeycomb Materials
• The Ideal Tensile Strength and Phonon Instability of Borophene
• Low lattice thermal conductivity of stanene
• Two-dimensional time-reversal-invariant topological superconductivity in a doped quantum spin Hall insulator
• Electronic Structures of N-doped Graphene with Native Point Defects
• Quantum thermal transport in stanene

Cited by in corpus (2)

• Strain Effects on the Mechanical Properties of Group-V Monolayers with Buckled Honeycomb Structures
• Failure of Griffith Theory on Prediction of Theoretical Strength of Ideal Materials