Auxetic properties of a newly proposed γ-graphyne-like material
2021
Abstract A new auxetic (negative Poisson’s ratio values) structure based on a γ -graphyne structure, here named A γ G structure, is proposed. The A γ G structural/mechanical and electronic properties, as well as its thermal stability, were investigated using classical reactive and quantum molecular dynamics simulations. A γ G is shown to have a bandgap larger than 1.6 eV and be thermally stable at a large range of temperatures. The classical and quantum results validate that the A γ G is auxetic, both when isolated (vacuum) and when deposited on a copper substrate. We believe that this is the densest auxetic structure belonging to the graphyne-like families.
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