Auxetic Black Phosphorus: A 2D Material with Negative Poisson's Ratio

Abstract

The Poisson's ratio of a material characterizes its response to uniaxial strain. Materials normally possess a positive Poisson's ratio - they contract laterally when stretched, and expand laterally when compressed. A negative Poisson's ratio is theoretically permissible but has not, with few exceptions of man-made bulk structures, been experimentally observed in any natural materials. Here, we show that the negative Poisson's ratio exists in the low-dimensional natural material black phosphorus, and that our experimental observations are consistent with first principles simulations. Through application of uniaxial strain along zigzag and armchair directions, we find that both interlayer and intralayer negative Poisson's ratios can be obtained in black phosphorus. The phenomenon originates from the puckered structure of its in-plane lattice, together with coupled hinge-like bonding configurations.

References in corpus (9)

• Semiconducting Black Phosphorus: Synthesis, Transport Properties and Electronic Applications
• Strain-Engineering Anisotropic Electrical Conductance of Phosphorene and Few-Layer Black Phosphorus
• Superior mechanical flexibility of phosphorene and few-layer black phosphorus
• Strain engineered direct-indirect band gap transition and its mechanism in 2D phosphorene
• Tuning of the electronic and optical properties of single layer black phosphorus by strain
• Observation of Low-frequency Interlayer Breathing Modes in Few-layer Black Phosphorus
• Lattice Vibrational Modes and Raman Scattering Spectra of Strained Phosphorene
• Anisotropic Ripple Deformation in Phosphorene
• Large Frequency Change with Thickness in Interlayer Breathing Mode - Significant Interlayer Interactions in Few Layer Black Phosphorus

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• Control of superconducting pairing symmetries in monolayer black phosphorus
• BP_5 Monolayer with Multiferroicity and Negative Poisson's Ratio: A Prediction by Global Optimization Method
• Accessing negative Poisson`s ratio of graphene by machine learning interatomic potentials