Porous silicene and silicon graphenylene-like surfaces: a DFT study

Computational insights into popsilicene as a new planar silicon allotrope composed of 5-8-5 rings

Silicon-based two-dimensional (2D) materials have garnered significant attention due to their unique properties and potential applications in electronics, optoelectronics, and other advanced technologies. Here, we present a comprehensive investigation of a novel silicon allotrope, Popsilicene (Pop-Si), derived from the structure of Popgraphene. Using density functional theory and ab initio molecular dynamics simulations, we explore the thermal stability, mechanical and electronic properties, and optical characteristics of Pop-Si. Our results demonstrate that Pop-Si exhibits good thermal stability at 1000 K. Electronic structure calculations reveal that Pop-Si is metallic, with a high density of states at the Fermi level. Furthermore, our analysis of the optical properties indicates that Pop-Si has pronounced UV-Vis optical activity, making it a promising candidate for optoelectronic devices. Mechanical property assessments show that Pop-Si has Young's modulus ranging from 10 to 92 GPa and a Poisson's ratio of 0.95. These results combined suggest its potential for practical applications.

Multiscale Green's function for silicene and its application to calculation of the strain field due to a vacancy

The multiscale Green's function method is extended to dual planar, two dimensional lattices and applied to calculate the lattice distortion and the strain field due to a vacancy in silicene. The method fully accounts for the discrete atomistic structure of the solid and links the atomistic and the macroscopic continuum scales seamlessly in the asymptotic limit.