Auxetic ographene: a new 2D Dirac nodal-ring semimetal carbon-based material with a high negative Poisson's ratio. Issue 36 (3rd September 2022)

• Record Type: Journal Article
• Authors: Wang, Shuaiwei; Shi, Bingjun
• Is Part Of: Physical chemistry chemical physics. Volume 24:Issue 36(2022)
• Page Start: 21806
• Page End: 21811
• Publication Date: 2022-09-03
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/d2cp01469f
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : A new auxetic carbon-based material with a Dirac nodal-ring and high negative Poisson's ratio is reported. Abstract : Auxetic and semimetallic materials possess many advanced applications due to the negative Poisson's ratio (NPR) effect and unique electronic properties. However, candidates with the above properties are rather scarce, especially in the 2D carbon materials. Here, a new 2D NPR material with a Dirac nodal ring, named ographene, is identified using first-principles calculations. Ographene possesses anisotropic Young's modulus and unusual in-plane NPR (−0.11), which mainly originated from its puckered tetrahedron structure. In addition, the electronic band structure calculations show that ographene is a topological node-ring semimetal with high Fermi velocity. Moreover, the electronic band structure is robust against external strain. The intrinsic NPR coupled with robust electronic properties renders auxetic ographene promising for applications in electronics and mechanics areas.