2022/02/23 by Yancong Wang, Linfeng Yu, Wang, Yancong +15
Chemistry · Materials Science · Physics and Astronomy · #2D Materials and Applications #Bilayer #Bilayer graphene #Boron and Carbon Nanomaterials Research #Chemical Physics (physics.chem-ph) #Chemistry #Composite material #Condensed matter physics #Coupling (piping) #FOS: Physical sciences #Graphene #Graphene research and applications #Heterojunction #Layer (electronics) #Materials science #Membrane #Nanoscopic scale #Nanostructure #Nanotechnology #Optoelectronics #Physics #Strain (injury) #physics.chem-ph
paper · pdf · doi:10.48550/arxiv.2202.11580
published in arXiv (Cornell University) (Cornell University)
arxiv created 2022/02/23 · openalex publication_date 2022/02/23 · arxiv updated 2022/02/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Negative Poissons ratio (NPR) is of great interest due to the novel applications in lots of fields. Films are the most commonly used form in practical applications, which involves multiple layers. However, the effect of interlayer interactions on the NPR is still unclear. In this study, based on first principles calculations, we systematically investigate the effect of interlayer interactions on the NPR by comparably studying single-layer graphene, few-layer graphene, h-BN, and graphene-BN heterostructure. It is found that they almost have the same geometry-strain response. Consequently, the NPR in bilayer graphene, triple-layer graphene, and graphene-BN heterostructure are consistent with that in single-layer graphene and h-BN. The fundamental mechanism lies in that the response to strain of the orbital coupling are consistent under the effect of interlayer interactions. The deep understanding of the NPR with the effect of interlayer interactions as achieved in this study is beneficial for the future design and development of micro-/nanoscale electromechanical devices with novel functions based on nanostructures.